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New Mexico
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Southwestern Riparian Woodland
Description, importance and conservation status:
These riparian woodlands occur solely in the southwestern quadrant of the state, from the Arizona and Mexican border north to the San Francisco drainage and east to a few drainages on the east slope of the Black Range, such as Las Animas Creek in Sierra County. It is roughly defined by the presence of Arizona sycamore. However, an area lacking Arizona sycamore may be classified as Southwestern Riparian if it is within the boundaries described above and has some of the southwestern priority species listed below, e.g. San Simon Cienaga. Elevations range from 4000 - 7000ft.
Tree- and shrub-dominated habitat along lower streams or rivers requires permanent water or a consistently high water table. Southwestern riparian woodland is generally dominated by Arizona sycamore (Platanus wrightii), and/or cottonwood (Populus spp.). Goodding willow (Salix gooddingii) may be a codominant, often with fremont cottonwood. Other trees may include netleaf hackberry (Celtis reticulata), boxelder (Acer negundo), Arizona alder (Alnus oblongifolia), velvet ash (Fraxinus pennsylvanica), walnut (Juglans spp.), screwbean mesquite (Prosopis pubescens), honey mesquite (P. glandulosa) and western soapberry (Sapindus saponaria). Non-native trees and shrubs include russian-olive (Elaeagnus angustifolia) and salt cedar (Tamarix spp.). Understory vegetation may include New Mexico olive (Forestiera neomexicana), skunkbush (Rhus trilobata), rabbitbrush (Chrysothamnus spp.), sandbar willow (Salix sp.), seepwillow (Baccharis glutinosa), false indigo (Amorpha fruticosa), coyote willow (S. exigua), arrowweed (Pluchea sericea), silvery buffaloberry (Shepherdia argentea), and Parthenocissus creepers.
Gallery forests are important components of Southwestern Riparian Woodlands. In these forests, shade-tolerant species replace pioneering species, which require more open conditions. There is more available moisture in these forests as a result of reduced soil temperatures beneath the canopy. Mature forests resist flooding, resulting in reduced erosion and bank containment, except in extreme cases (Dick-Peddie 1993).
These riparian areas are the most species-rich in New Mexico. They support a higher percentage of breeding species than any other habitat due to their complex structural components, the continual presence of water, and their location in close proximity to Mexico. Marshes and other wetland habitats are created by widening river valleys or through the creation of oxbows. Stoleson and Finch (1998) have studied breeding bird density in six areas along the Gila River in southwestern New Mexico. They have documented some of the highest breeding bird densities north of Mexico.
The Gila River remains the only large, undammed river in New Mexico. Natural flooding regimes on this river, as well as the Mimbres, maintain the dynamic nature to which this habitat is adapted.
Impacts to habitat include: 1) habitat loss due to development or agriculture, 2) overgrazing, 3) recreation and off-road vehicle use, 4) lack of regeneration of cottonwood and willow due to altered flood regimes 5) lower water tables 6) water diversion or damming, 7) poor in-stream flow management, and 8) invasion of exotic weeds and grasses.
Several New Mexico high-priority species regularly breed only in Guadalupe Canyon in Hidalgo county. These are Broad-billed Hummingbird, Violet-crowned Hummingbird, and Thick-billed Kingbird.
Owners/managers of these lands include the US Forest Service, the state, and private land-owners.
Physiographic Areas covered: Mexican Highlands, Chihuahuan Desert and the Mogollon Rim
Associated priority species from Appendices B and C:
Table 1. Southwestern Riparian Woodland Priority Species
|
Highest Priority |
Priority |
High Responsibility |
|
Common Black-Hawk
Common Ground-Dove
Elf Owl
Broad-billed Hummingbird
Violet-crowned Hummingbird
Elegant Trogon
Gila Woodpecker
Willow Flycatcher
Thick-billed Kingbird
Bell’s Vireo
Lucy’s Warbler
Summer Tanager
Abert’s Towhee |
Zone-tailed Hawk
Gambel’s Quail
Yellow-billed Cuckoo
Brown-crested Flycatcher
Hooded Oriole |
Black-chinned Hummingbird
Ash-throated Flycatcher
Bridled Titmouse |
|
Additional Representative Species: Vermilion Flycatcher |
Bird Habitat Requirements, Population and/or Habitat Objectives:
(in taxonomic order)
Common Black-Hawk (Schnell 1994)
Associated Species:
Great Blue Heron, Black-crowned Night-Heron, Gila Woodpecker, Brown-crested Flycatcher, Lucy’s Warbler, Summer Tanager, Hooded Oriole, Bullock's Oriole
- mature gallery cottonwood-willow and mixed broadleaf forests with trees 75-100 ft (23-30 m) in height
- perennial streams with areas <12 in (30cm) deep with a moderate gradient and riffles
- perches include exposed boulders and low branches, and snags in rivers (NM PIF)
- may use intermittent streams if water seepage or pools are not available
- nest trees include cottonwood, sycamore, velvet ash, Arizona walnut, alder, Goodding willow, ponderosa pine and Douglas-fir: will not nest in isolated trees.
- average nest height 53.7 ft (17.9m), average distance from stream 126 ft (42m)
- chronic human presence causes abandonment, overnight campers may cause premature fledging dispersal from nest resulting in nest failure
Distribution: Found along the Gila, San Francisco and Mimbres Rivers in the southwestern quadrant of the state as well as along the Rio Hondo in the southeast. They have nested occasionally along the Rio Grande as far north as Albuquerque.
Population and/or Habitat Objectives:
- no BBS data available
- maintain a minimum population of approximately 100 breeding pairs in the state (Williams 1999)
- enhance riparian forests along the Gila, Mimbres, and San Francisco rivers to increase statewide population to 125 breeding pairs by the year 2019
- maintain a stable or increasing nest success rate of at least 78%
- conserve and rejuvenate existing riparian corridors.
- encourage nest-tree regeneration and limit grazing so young cottonwoods can become future nest trees
- creation of small impoundments near nest trees
- decrease of human disturbance during nesting period
- avoid channelization of the river
Zone-tailed Hawk (DeGraaf et al. 1991)
Associated Species: Western Screech-Owl, Whiskered Screech-Owl, Gila Woodpecker, Lucy
=s Warbler, Grace=s Warbler, Summer Tanager
- deep, rough, rocky, wooded canyons; also cottonwood riparian forests
- nests from 25-100ft (8-30 m) above ground; along the Gila River nests have been from 60-82 ft (18-25m) above the ground (S. Stoleson pers. comm.); in the Jemez mountains and the Pajarito Plateau, nest heights averaged 75 ft above ground (22.9m) (Kennedy et al. 1995)
- nest trees in the Jemez mountains and the Pajarito Plateau were all ponderosa pine in the bottom of or on slopes of steep-walled canyons; averaged 78 ft (23.8m) high and 23 in. (59.8cm) dbh (Kennedy et al. 1995)
- open deciduous or pine-oak woodlands preferred
- will forage over agricultural bottom lands and open hilly uplands (S. Stoleson pers.comm.)
- prey items include birds, ground squirrels, snakes, and lizards
- often found in remote areas away from human disturbance
- arrives in northern NM: late March - early April; breeding season ends late Sept. (Kennedy et al. 1995)
- vulture mimicry and association may be a foraging technique (Zimmerman 1976)
Distribution: found in southwestern NM and the Sacramento mountains. A small population exists around Los Alamos and Bandelier NM and possibly Mills Canyon along the Canadian River. The potential exists for small populations throughout the state.
Population and/or Habitat Objectives:
- no BBS data available
- maintain large pines in canyons and cottonwoods in riparian forests
- maintain large trees inside canyons
- create conservation areas in high density areas away from much human disturbance
Common Ground-Dove (Williams 1999)
Associated Species:
Gambel's Quail, Bell's Vireo, Abert's Towhee, Northern Beardless Tyrannulet, Varied Bunting, Crissal Thrasher
- found at elevations up to 5000 ft (1500m)
- shrubby riparian habitat often at the edges of riparian woodlands
- also found in desert shrub dominated by mesquite or Opuntia spp.
- may need bare ground component for feeding
- abandoned agricultural and tall weedy fields (D.Zimmerman pers.comm.)
Distribution: Found most frequently in the lower Gila Valley (from Cliff south) and Hidalgo county, especially in Guadalupe Canyon. Also rarely in the Rio Grande Valley south from Socorro and in Eddy County. (Williams 1999)
Population and/or Habitat Objectives:
- in Region 2, T = -0.06%, p = 81, N =35, RA = 2.07 (Sauer et al. 1997)
- maintain presence in Mexican Highlands and Chihuahuan Desert
- maintain shrub component with bare ground in riparian woodlands
- leave border of tall weeds around agricultural fields
Elf Owl (Johnsgard 1988)
Associated Species: Common Poorwill, Gila Woodpecker, Acorn Woodpecker, Dusky-capped Flycatcher, Brown-crested Flycatcher, Bridled Titmouse, White-breasted Nuthatch, Lucy's Warbler
- occurs in low river bottoms and adjacent uplands
- will nest in holes of cottonwoods, sycamores, junipers, oaks, pines and other trees in these habitats
- feeds mostly on insects and other arthropods
- in Arizona, a minimum nesting density of 4.6 pairs per square km; density is believed to be higher in upland habitats
Distribution: Found in southwestern New Mexico, north to the Glenwood area and east to Las Animas Creek near Truth or Consequences. They occur as far north as the Magdalena mountains.
Population and/or Habitat Objectives:
- no BBS data available
- maintain populations at Las Animas Creek, Mogollon Creek and the San Francisco and Gila Rivers
- maintain large cottonwoods and sycamores in riparian areas for nesting substrate
- maintain grassy understory for insect, especially moth, production
- limit grazing in riparian areas during the summer months to allow for sufficient grass growth and for nest tree regeneration
Elegant Trogon (Kunzmann et al. 1998)
Associated Species:
Zone-tailed Hawk, Elf Owl, Black-chinned Hummingbird, Dusky-capped Flycatcher, Hepatic Tanager, Brown-crested Flycatcher, Magnificent Hummingbird, Strickland's Warbler
- in New Mexico, riparian Arizona Sycamore- and oak-dominated system with a slope component
- sycamores, pine, and oak are critical habitat components in New Mexico (NMPIF)
- needs larger stem trees
- increased abundance associated with Strickland’s Woodpecker and Dusky-capped Flycatcher
- surface water may be important
- a cavity nester, in either live or dead trees, most often in sycamores, sometimes nests in oaks or pines
Distribution: Currently found only in the Peloncillo Mountains
Population and/or Habitat Objectives:
- no BBS data available
- maintain current population in the Peloncillo mountains
- limit drawdown of water table in nesting canyons. A high water table is critical for sycamore rejuvenation
- maintain snags and larger trees in oak and oak/sycamore canyons
- enhance sycamore habitat on the Arizona portion of the Peloncillos
Gila Woodpecker (Williams 1999)
Associated Species:
Common Black-Hawk , Elf Owl, Northern Flicker, Brown-crested Flycatcher, Hooded Oriole
mature cottonwood or sycamore forest
found from 3700-4900ft (1130m - 1494m)
nest cavities in New Mexico ranged in height from 8-40ft (2.4 - 12m) most were above 15ft (4.5m)
Gila Woodpeckers did not occur in isolated cottonwood groves of less than 50ac (20ha) in Arizona (Rosenberg et al. 1991)
competes with starlings (Rosenberg et al. 1991 in Williams 1999)
Distribution: Found in the lower Gila Valley in Hidalgo and Grant counties, Guadalupe Canyon, San Simon Cienaga, drainages of the Animas Mtns., and Bitter Creek in western Grant County.
Population and/or Habitat Objectives:
- in Region 2, T = 0.5%, p = 0.72, N =30, RA = 7.79 (Sauer et al. 1997)
- maintain the current breeding pairs in the Animas Valley, and San Simon Cienaga in the Mexican Highlands
- maintain and enhance breeding habitat along the Gila River by allowing regeneration of sycamore and cottonwoods
- increase population to 2 breeding pair per mile of stream along the Gila River from the confluence of Mogollon Creek to the Arizona border bringing population to at least 50 pairs by the year 2019
- avoid channelization of rivers
Southwestern Willow Flycatcher (Stoleson and Finch 1998)
Associated Species: Green Heron, Yellow-billed Cuckoo, Lucy’s Warbler, Yellow Warbler, Yellow-breasted Chat, Blue Grosbeak
- riparian obligate needing dense habitat and wet soil (NM PIF)
- often found on broad, floodplain areas; avoids narrow and steep-sided canyons
- 10-33 ft (3-10m) tall tree willows, especially mid-successional stages of willows with coyote willow or other dense shrub understory offering multi-layered structure, very important (NM PIF)
- preferentially occupies older mixed species patches on the Gila River; younger patches occupied only where adjacent to densely populated, mature patches
- along the Gila, boxelder are predominantly selected , in declining order of use other nesting substrate are willow, Russian-olive, Arizona alder, cottonwood, seepwillow, sycamore, rose vine, and tamarisk
- along the Gila, mean nest height 24.2 ft (7.4m) with a range of 3.9-60.7 ft (1.2 - 18.5m), mean nest height is much lower elsewhere in the state (Sogge et al. 1997)
- preliminary analyses of microhabitat along the Gila indicates preference for open water or saturated soils, high stem densities, dense understory, dense foliage structure, high canopy cover, and presence of willows
- Willows are the preferred nesting substrates in New Mexico, with the exception of the Gila River, where they nest predominantly in boxelders
- cowbird parasitism rates were 11-16%, and were higher in younger habitats and in non-boxelder substrates
Distribution: Core population for the United States in along the Gila River. Other populations scattered across the state but only one current nesting site east of the Rockies.
Population and/or Habitat Objectives:
- No BBS data available for this subspecies
- establish 3 disjunct populations of at least 12 breeding pair in the state by 2009
- establish 2 populations of lesser numbers near each core breeding area
- manage potential habitat to achieve structural and vegetation characteristics necessary to support increasing numbers of breeding Flycatchers within 20 years
- establish or maintain 6 disjunct populations of at least 12 breeding pairs each, with 2 satellite populations of lesser numbers by 2019
- maintain dense multi-storied riparian habitat
- maintain mature boxelders on the Gila River. In general, extremely dense, tall10-30 ft (3-10m) willows or other shrubs are required for nesting. Nesting in taller boxelder occurs on this river. On the Gila River, work will also benefit this species as long a multi-story habitat with willow presence is maintained
- manage water levels to maintain soil saturation in appropriate habitat
- tamarisk eradication is not necessarily part of managing for this species, however when paired with cottonwood and willow reintroduction the habitat eventually produced is considered more optimal
Vermilion Flycatcher (DeGraaf et al. 1991)
Associated Species:
Western Wood-Pewee, Black Phoebe, Yellow Warbler, Blue Grosbeak, Bullock's Oriole, Yellow-breasted Chat, Lucy's Warbler
- occurs exclusively near water
- riparian associations containing cottonwood, willow, oak, mesquite, and sycamore
- often in association with openings or edges onto grassy or agricultural areas
- of 21 studied nests along the Gila, nests heights range from 11.5-93.5 ft (3.5 - 28.5m) averaging 40.3 ft (12.3 m), SD=25.6 ft (7.8m); nests are primarily in cottonwood and Goodding willow, but one is found in an elm; most nests are on or near an edge and from 6.6-13 ft (2-4m) horizontal distance from the trunk of the nest tree (S. Stoleson 1998)
- only occasionally parasitized by cowbirds (S. Stoleson 1998)
Distribution: Found along rivers and streams in the south; in the East, north to Roswell with scattered others north to the Logan area, in the Rio Grande Valley north to Bosque del Apache NWR, and in the West, along Gila drainages, Guadalupe Canyon and the lower Mimbres.
Population and/or Habitat Objectives:
- in Region 2, T = -2.3%, p = 0.22, N = 47, RA = 0.65 (Sauer et al. 1997)
- stabilize population trends in New Mexico
Bell's Vireo (Brown 1993)
Associated Species: Lucy's Warbler, Yellow-breasted Chat, Northern Cardinal, Blue Grosbeak, Painted Bunting, Abert's Towhee, Bullock's Oriole
dense multi-layered habitat (low- and mid-story) needed 1.5 - 9 ft (0.6 - 3.0 m) above ground, characteristic of early successional stages, often near water
habitat specialist in seepwillow- and mesquite- dominated habitats (even if tamarisk is available), a generalist in riparian scrubland dominated by tamarisk
nests in mesquite have not been documented in NM (J. Parody unpubl. data)
in New Mexico, nests most often found in hackberry, algerita, soapberry, or seepwillow (Williams 1999)
forages up to 66 ft (20m) above ground but 69% of foraging is below 13 ft (4m)
consumes more large insects than any other Vireo spp.
uses small lateral or terminal forks of low pendant branches for nests, generally 1.5 - 4.5 ft (0.5 to 1.5m) above ground; ranging from 0.7-26 ft ( 0.2- 8.0m)
Distribution: Found in the Pecos valley north to drainages west of Roswell, in the Rio Grande Valley, north to San Antonio, and in southwestern New Mexico, in the lower Gila, at San Simon Cienaga and Guadalupe Canyon (Williams 1999)
Population and/or Habitat Objectives:
- in Region 2, T = -3.4%, p = 0.02, N = 116, RA = 2.23; in the Pecos and Staked Plains, T = 1.4%, p = 0.7, N = 14, RA = 2.78 (Sauer et al. 1997)
- increase population to at least 8 breeding pairs at Rattlesnake Springs
- maintain populations along the Gila from Redrock to the Arizona border
- reduce parasitism to less than 50% per year in these areas
- increase known viable breeding populations to at least sites 10 throughout the Chihuahuan Desert by 2019
- maintain dense low and midstory habitat characteristic of early successional vegetation stages in close proximity to streamsides
- enhance habitat on the Rio Grande below Socorro, and especially along the Gila River
- limit grazing in order to maintain dense understory and reduce cowbird parasitism
Lucy's Warbler (Stoleson et al. 2000)
Associated Species: Yellow-billed Cuckoo, Gila Woodpecker, Summer Tanager, Black-headed Grosbeak, Blue Grosbeak, Bullock's Oriole
mature closed-canopy riparian bosque and late successional stage woodlands, (Stoleson 1998) up to approximately 5000 ft in elevation (T. Corman pers. comm.)
nests in cavities or behind loose bark, burrows or depressions in banks or rocky crevices, may use tamarisk if all that is available. Occasionally they will nest in deserted Verdin or Toxostoma thrasher spp. cavities
Nests in New Mexico have been found in cottonwood, Goodding's willow and boxelder; in Arizona where the species has been more extensively studied, the species nests primarily in tall, dense mesquite. This has not been documented in New Mexico
nests in New Mexico range from 2.9-43.3 ft ( 0.9 - 13.2m) above ground with mean height of 23.3 ft (7.1m)
will not use nest boxes
cowbird parasitism may be a problem along the Gila River (Stoleson 1998)
Distribution: Found in the southwestern quadrant of the state north in the Rio Grande Valley to Socorro and occasionally to Bernardo and in the west north to Glenwood area. Not found further east than the Rio Grande River.
Population and/or Habitat Objectives:
- in Region 2, T = -0.3%, p = 0.8, N = 35, RA = 8.22 (Sauer et al. 1997)
- maintain density of 35 pair per mile along the Gila watershed (Stoleson 1998)
- maintain or enhance suitable habitat to establish 8 pair per mile in the Rio Grande watershed from Socorro south
- maintain populations in the Mexican Highlands
- maintain closed canopy riparian forest
- maintain snags along streamsides
- reduce the use of levees to allow floodplain use by rivers during highflow events
- limit fuelwood gathering to downed logs
Summer Tanager (Robinson 1996)
Associated Species: Black-crowned Night-Heron, Cooper’s Hawk, Common Black-Hawk,, Lewis's Woodpecker, Lucy’s Warbler, Yellow Warbler, Blue Grosbeak
- occupies riparian woodlands dominated by tall cottonwood, willow, and sycamore where they occur (NM PIF)
- uses cottonwood, Goodding willow and boxelder for nesting in New Mexico (Stoleson 1998)
- May use tamarisk dominated woodland at higher elevations (up to approx. 5500ft); tamarisk must be at least 20 ft (66m) in height (B. Howe pers. comm.)
- nests on the Gila River ranged from 14-98 ft (4.3-30m) averaging 39.7 ft (12.1m in height) (Stoleson 1998)
- bee and wasp specialist; also takes other flying insects; will eat fruit in fall
- forages at average heights of approx. 31 ft (10m) in trees depending on forest structure
- in CA, average height of nests was 35ft (11.3m)
Distribution: Found in drainages in most of the southern two thirds of the state north to Cochiti, probably also regular in small numbers in the Canadian River drainage south of Mills Canyon.
Population and/or Habitat Objectives:
- Region 2, T = -0.05%, p = 0.37, N = 115, RA=1.44 (Sauer et al. 1997)
- maintain a density of 6 pair per mile along the Gila watershed (Stoleson and Finch 1998)
- enhance habitat to create conditions favorable to the reestablishment of populations in at least one site above Cochiti Lake
- maintain mature riparian forests with cottonwood and willow associations
- maintain riparian tree height at 20ft (66m), preferably higher
Abert's Towhee (Tweit and Finch 1994)
Associated Species:
Gambel's Quail, Bell's Vireo, Bewick's Wren, Northern Cardinal, House Finch
- well developed cottonwood-willow with a dense understory of shrubs; marginal habitat includes remnants of riparian woodland and shrubs, marshes and mixed exotic-native habitat
- especially common along the edges of mature mixed broadleaf forest along the Gila (Stoleson 1998); uncommon to nonexistent in early successional habitats such as pure Russian-Olive or willow
- prefers nesting in Baccharis spp. and Lycium or mistletoe, Mexican elderberry or thick cottonwood branches. Historic records in recently cut willow stumps surrounded by sprouts, will nest in mesquite.
- along the Gila, nests found in boxelder, Russian-olive, New Mexico locust, and Fremont cottonwood; nest heights averaged 5.6 ft (1.7m) with a range of3-8.2 ft ( 0.9 - 2.5m)
- prefers trees to shrubs as nest sites when both have leaves, but avoids bare trees
Distribution: Found along the Gila River from the Arizona border to Mogollan Creek. Also found at San Simon Cienaga.
Population and/or Habitat Objectives:
- no BBS data available
- Increase populations to at least 50 breeding pairs along the Gila River
- Increase population to 8 breeding pairs at San Simon Cienaga
- Survey for additional populations in the Gila watershed
- maintain and increase cottonwood/willow associations with a dense understory
- limit grazing to the extent that a dense understory is maintained
Guadalupe Canyon only:
Thick-billed Kingbird (Williams pers. comm.)
Associated Species:
Violet-crowned Hummingbird, Gila Woodpecker, Brown-crested Flycatcher, Phainopepla
- large trees in riparian broadleaf forests
- open areas interspersed with large trees
- often found foraging on hillsides in Guadalupe Canyon
Broad-billed Hummingbird (Williams 1999)
Associated Species:
Black-tailed Gnatcatcher, Varied Bunting
- found in arid and semi-arid habitats in mid-high elevation desert canyons, in riparian woodlands and foothills woodlands
- found in groves of sycamore/cottonwoods with dense mesquite at 3000 - 5000ft elevation
- in Guadalupe Canyon, nests in thickets near edge of canyon primarily with a northern exposure, bordered by rock outcroppings with hackberry, algerita, and mesquite (Baltosser 1989)
- has two nesting peaks: one starting mid-April coincides with peak blooming of Penstemon pseudospectabilis, the other starting in late June coincides with peak blooming of Agave parryi (Baltosser 1989)
Violet-crowned Hummingbird (Williams 1999)
Associated Species:
Elf Owl, Brown-crested Flycatcher, Phainopepla
- in Guadalupe Canyon, uses broadleaf riparian forests with mature trees
- needs open areas near a stream with nearby xeric hillsides (Baltosser 1989)
- needs large amounts of herbaceous cover with shrubs near stream bottoms, seepwillow and burrobush
- hillsides, which often have sumac and algerita, are typical
- all NM nests occur in Arizona sycamore in open cups with overhanging leaf cover for shade (Zimmerman and Leroy 1960)
Population and/or Habitat Objectives for above three species:
- no BBS data available for any of these species
- maintain the current breeding populations
- maintain habitat in Guadalupe Canyon
- cool-season only grazing, or cattle exclusion, in this canyon will benefit both hummingbirds
- Prescribed burns in this particular canyon will not result in a net benefit for any of the priority species. Two of the southwestern habitats which are not well-adapted to fire are riparian woodlands and Chihuahuan Desert scrub, which comprise the majority of habitat in Guadalupe Canyon.
Overall Habitat Strategies:
Whenever possible, it is recommended that conservation easements be obtained on lands with riparian areas. It is also suggested that riparian lands be purchased from willing sellers.
Grazing -Seasonal grazing, short duration, rest-rotation grazing, and appropriate stocking rates allow for the regeneration of cottonwood and willow. Grazing should be managed through these methods to establish appropriate riparian habitats. It is recommended that riparian areas be fenced for cattle exclusion with willing landowners.
Fire - Restore cottonwood, sycamore, and willow saplings as soon as possible after a fire in a riparian area.
Water - Restore natural flood cycles or manage water flow to emulate flood cycles on a regular basis, at least every five years, in conjunction with replanting of cottonwood, willow, and sycamore to create a mosaic of riparian successional stages. Provision of off-river water sources will reduce the demand on riparian systems. Management of uplands to restore natural hydrology is highly recommended. Avoid channelization of river corridors wherever possible.
Research and monitoring needs:
1. Determine Common Ground-Dove breeding locations within the state.
Determine cause of declining Common Ground-Dove population.
2. Determine distribution and breeding density of Elf Owl in various habitats in the state.
3. Determine the number of Gila Woodpecker breeding pairs, distribution, habitat requirements, and limiting factors within New Mexico.
4. Determine habitat requirements for Lucy's Warbler in New Mexico.
5. Determine number of Abert's Towhee breeding pairs in the state.
6. Assess effectiveness of riparian restoration on bird populations on Gila and Mimbres.
7. Assess effects of irrigation on birds.
8. Assess effects of various grazing techniques on bird populations in riparian areas.
9. Assess effects of concentrated unofficial "campgrounds" in critical riparian areas on bird populations.
Additional species for which monitoring is recommended:
- Vermilion Flycatcher
- Phainopepla
Table 2. Southwestern Riparian Woodland Priority Species: Habitat Factors
|
Species
|
Vegetation Composition/ Structure |
Abiotic Factors |
Landscape Factors |
Special Factors |
|
CBHA |
gallery forests with cottonwood or sycamores averaging 75-100 ft. |
streams averaging 30cm in depth; with moderate gradient and riffles |
must have exposed perches and boulders near or in stream |
chronic human disturbance will cause abandonment |
|
ZTHA |
cottonwood riparian forests or pine-oak associations; nest trees must be at least 30ft. high |
may nest in steep canyons |
often found in remote areas |
often found far from human disturbance |
|
ELTR |
Arizona sycamore dominated riparian area with surrounding oaks; in AZ pine is also a critical component of habitat |
often oaks on surrounding slopes |
nests within 300m of water which may be a critical factor |
secondary cavity nester |
|
GIWO |
mature cottonwood and/or sycamore forest |
|
maintain patches of at least 20ha of mature cottonwood forest |
|
|
WIFL |
willow associated riparian areas (but see above for Gila R.); dense multi-storied understory; 3-10m willows for nesting |
saturated soil or slow-moving water adjacent to nesting area |
often found on broad, floodplains; avoids narrow and steep-sided canyons |
|
|
VEFL |
cottonwood/willow/hackberry/mesquite riparian areas |
|
must be near water |
|
|
BEVI |
riparian vegetation dominated by seepwillow, mesquite or occasionally tamarisk; dense, multi-layered habitat in lower 9ft. of vegetation typical of early successional stages |
|
often associated with water |
|
|
LUWA |
mature, closed canopy cottonwood forest |
trees must be large enough to have loose bark or support woodpecker cavities |
|
will not use nest boxes |
|
SUTA |
cottonwood/willow forests, nests average 35ft. high; may use tamarisk at higher elevations - tamarisk must be at least 20ft. high |
|
|
bee and wasp specialist |
|
ABTO |
well-developed cottonwoods, dense understory often with Baccharis spp. |
|
|
|
Guadalupe Canyon Table 2.
|
Species
|
Vegetation Composition/ Structure |
Abiotic Factors |
Landscape Factors |
Special Factors |
|
VCHU |
broadleaf riparian forests with mature trees; needs large amounts of herbaceous cover with shrubs near stream bottoms |
needs open areas near a stream with nearby xeric hillsides |
typical hillsides often have sumac and algerita |
all NM nests occur in Arizona sycamore in open cups with overhanging leaf cover for shade |
|
BBLH |
riparian woodlands and foothills; woodlands found in groves of sycamore/cottonwoods with dense mesquite |
3000 - 5000ft elevation |
arid and semi-arid habitats in mid-high elevation desert canyons; nests in thickets near edge of canyon primarily with a northern exposure, bordered by rock outcroppings with hackberry, algerita, and mesquite |
has two nesting peaks: one starting mid-April coincides with peak blooming of Penstemon pseudospectabilis, the other starting in late June coincides with peak blooming of Agave parryi |
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TBKI |
large trees in riparian broadleaf forests |
open areas interspersed with large trees |
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often found foraging on hillsides in Guadalupe Canyon |