The Lower Rio Grande COA covers approximately 4,921 ha (12,160 ac) and is situated near Radium Springs. It encompasses a portion of the lower Rio Grande valley and the adjacent upland areas.

The majority of this COA (~61%) is privately owned, while ~30% is managed by the BLM. The remaining 9% is managed by the SLO (7%) and NMSP (2%). About 21% of this COA is currently protected.

The COA supports nine native vegetation habitats, two ruderal or introduced vegetation types, and agricultural vegetation, barren areas, developed and urban spaces, and open water. The dominant habitats are Chihuahuan Desert Scrub (49%) and Chihuahuan Semi-Desert Grassland (8%). Agricultural vegetation (18%) and developed and urban spaces (8%) are also relatively common. Introduced Riparian Vegetation (4%) and Southwest Lowland Riparian Shrubland (3%) are the most prevalent riparian vegetation types. Perennial aquatic habitats include 22 km (14 mi) of warm-water streams.

A total of 39 SGCN are found (either observed or with potential habitat) within the COA, including 12 classified as Conservation Impact Species (I) and six as Current Focal Species (F). This COA has high potential to contain microclimate refugia for amphibians.

Habitat Name

Habitat Size in Hectares

  • Agricultural Vegetation

    876

  • Arid West Interior Freshwater Emergent Marsh

    13

  • Barren

    0.2

  • Chihuahuan Desert Scrub

    2429

  • Chihuahuan Ruderal Grassland

    44

  • Chihuahuan Semi-Desert Grassland

    374

  • Cliff, Scree, and Rock Vegetation

    4

  • Desert Alkali-Saline Wetland

    120

  • Developed and Urban

    385

  • Introduced Riparian Vegetation

    191

  • Madrean Lowland Evergreen Woodland

    2

  • Open Water

    151

  • Southwest Lowland Riparian Forest

    55

  • Southwest Lowland Riparian Shrubland

    152

  • Warm-Desert Arroyo Riparian Scrub

    124

Species (SGCN)


Arizona Treefrog
Hyla wrightorum
Banded Rock Rattlesnake
Crotalus lepidus klauberi
Bank Swallow
Riparia riparia riparia
Barking Frog
Craugastor augusti latrans
Bendire's Thrasher
Toxostoma bendirei
Black-chinned Sparrow
Spizella atrogularis evura
Black-throated Gray Warbler
Setophaga nigrescens
Cassin's Finch
Haemorhous cassinii
Chestnut-collared Longspur
Calcarius ornatus
Common Nighthawk
Chordeiles minor
Elf Owl
Micrathene whitneyi whitneyi
Evening Grosbeak
Coccothraustes vespertinus
Gray-checkered Whiptail
Aspidoscelis dixoni
Gray Vireo
Vireo vicinior
Juniper Titmouse
Baeolophus ridgwayi
Loggerhead Shrike
Lanius ludovicianus
Long-billed Curlew
Numenius americanus americanus
Lucy's Warbler
Leiothlypis luciae
Mexican Tetra
Astyanax mexicanus
Northern Leopard Frog
Lithobates pipiens
Ovate Vertigo Snail
Vertigo ovata
Pinyon Jay
Gymnorhinus cyanocephalus
Plains Leopard Frog
Lithobates blairi
Rio Grande Chub
Gila pandora
Rio Grande Shiner
Notropis jemezanus
Rio Grande Silvery Minnow
Hybognathus amarus
Sage Thrasher
Oreoscoptes montanus
Smallmouth Buffalo
Ictiobus bubalus
Snowy Plover
Charadrius nivosus
Southwestern Little Brown Myotis
Myotis occultus
Southwestern Willow Flycatcher
Empidonax traillii extimus
Speckled Chub
Macrhybopsis aestivalis
Spotted Bat
Euderma maculatum
Thick-billed Longspur
Rhynchophanes mccownii
Vesper Sparrow
Pooecetes gramineus
Virginia's Warbler
Leiothlypis virginiae
Western Massasauga
Sistrurus tergeminus
Yellow-bellied Water Snake
Nerodia erythrogaster transversa
Yellow-billed Cuckoo
Coccyzus americanus occidentalis