Download a professional PDF field guide featuring all the species found in Lower Rio Grande Valley National Wildlife Refuge (Teniente). Perfect for outdoor adventures, education, and nature exploration.
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Showing 20 most frequently observed species out of 77 total documented species.

Javelina

Texas Silverleaf

Northern Mockingbird

Silverleaf Nightshade
Scissor-Tailed Flycatcher
Texas Spotted Whiptail
Buffelgrass
Western Pygmy Blue Butterfly

Texas Ebony

Queen

Sea Oxeye

Texas Toad

Crested Caracara


Guineagrass
Get all 77 species with 3-4 high-quality images each, detailed descriptions, and a downloadable PDF for offline use.
Compared to 8 nearby locations in Willacy County County, Texas
These comparisons are based on documented wildlife observations from citizen science data. Locations with higher species counts may have more observation activity, different habitat types, or larger coverage areas. Regional rankings help identify biodiversity hotspots and unique natural areas within Willacy County County.
The Lower Rio Grande Valley National Wildlife Refuge (teniente) ecosystem supports 77 documented wildlife species across 73 taxonomic genera. Located in Willacy County, Texas, this area provides critical habitat with diverse natural communities. The location hosts 16 frequently observed species and 15 occasionally documented species, creating a balanced ecosystem with both resident and visiting wildlife. Compared to nearby Willacy County, Lower Rio Grande Valley National Wildlife Refuge (teniente) hosts 3% more species diversity. This location ranks #19 for species diversity among 100 Willacy County County natural areas, placing it in the 81th percentile for biodiversity.