Download a professional PDF field guide featuring all the species found in Lower Rio Grande Valley National Wildlife Refuge. Perfect for outdoor adventures, education, and nature exploration.
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Showing 20 most frequently observed species out of 80 total documented species.

Tuza De Texas
Coast Indigo
Ocelot

Guineagrass
Waterweed

Sticky Florestina
Queen

White Peacock
Lince
Monarch
Coyote
Tesajo Cactus


Ferruginous Pygmy Owl


Tickseed

Coatbuttons
Sunflower
Silverleaf Nightshade
Get all 80 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 ecosystem supports 80 documented wildlife species across 76 taxonomic genera. Located in Willacy County, Texas, this area provides critical habitat with diverse natural communities. The location hosts 17 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 hosts 7% more species diversity. This location ranks #10 for species diversity among 100 Willacy County County natural areas, placing it in the 90th percentile for biodiversity.