Coyote: A sighting exists for the month of July

Mountain Lion: Rare. On 12th July 2011, a male was heard calling in an area of mesquite next to the lake. It was briefly observed twice

Mule Deer: Rare. 6 were observed on 8 July 2011

Desert Cottontail: Resident throughout the year, but scarcer than the following species

Black-tailed Jackrabbit: A very common resident, easily observed in desert scrub

Spotted Ground Squirrel: Sightings for the months of June thru September

Long-nosed Leopard Lizard: Sightings exist for the months of July and August

Ornate Tree Lizard: Sightings exist for the months of March thru August

Common Side-blotched Lizard: Sightings exist for March, May, August and September. Male is pictured on the left, female on right.

Southwestern Fence Lizard: Sightings exist for the months of April thru August, and October

Tiger Whiptail: Sightings exist for the months of April thru August

Desert Grassland Whiptail: Sightings exist for the months of May thru November

Texas Horned Lizard: Sightings exist for the months of April thru October

Round-tailed Horned Lizard: Sightings exist for the months of April thru September

Western Banded Gecko: A juvenile was photographed on the 22 March and another was observed on 3 October 2011. An adult was photographed on 5 April 2012

Gophersnake: Sightings exist for the months of July thru September

Western Hog-nosed Snake: Sightings exist for the months of July and August

Western Diamond-backed Rattlesnake: Sightings exist for the months of April, May and August

Prairie Rattlesnake: A single sighting exists for the month of September

Mexican Spadefoot: A sighting exists for the month of July

Couch’s Spadefoot: A female was photographed on the 16 March 2011

Green Toad: Sightings exist for the month of July

Great Plains Toad: Observed in the months from May thru July

Woodhouse's Toad: Sightings exist for the months of July and August

Yellow Mud Turtle: A sighting exists for the month of July

Two-tailed Swallowtail: Sightings exist for the months of June and August

Pipevine Swallowtail: Sightings exist for the months of March thru September

"Desert" Black Swallowtail: Sightings exist for the month of March

Checkered White: Sightings exist for the months of June and July

Clouded Sulphur: Sightings exist for the months of August thru October

Orange Sulphur: Sightings exist for the month of September

Sleepy Orange: Sightings exist for the months of March, June and November

Dainty Sulphur: Sightings exist for the months of March and May

Gray Hairstreak: Sightings exist for the months of March, and June thru September

Juniper Hairstreak: Sightings exist for the month of April

Western Pygmy-Blue: Sightings exist for the months of September and November

Marine Blue: Sightings exist for the months of May thru September

Ceraunus Blue: Sightings exist for the months of April, June, July and September

Fatal Metalmark: Sightings exist for the month of November

Variegated Fritillary: Sightings exist for the months of June and September

Painted Crescent: Sightings exist for the month of September

Bordered Patch: Sightings exist for the months of August thru October

Variable Checkerspot: Sightings exist for the month of September

Mourning Cloak: Sightings exist for the months of March and June

American Lady: A sighting exists for the month of July

Arizona Sister: Sightings exist for the month of June

American Snout: Sightings exist for the months of September and October

Monarch: Sightings exist for the months of July thru November

Queen: Sightings exist for the months of March, and June thru October

Red Satyr: Rare. An individual was photographed on the 21 June 2011

Common Sootywing: Sightings exist for the months of July and September

Saltbush Sootywing: Sightings exist for the month of April

Common/White Checkered-Skipper: These two species are indistinguishable in the field. Sightings exist for the months of March thru October

Orange Skipperling: Sightings exist for the month of June

Dotted Roadside-Skipper: Sightings exist for the month of April

Familiar Bluet: Very common, often numbering in the thousands. Sightings exist for the months of May thru November

Arroyo Bluet: Sightings exist for the months of June and July

Pacific/Plains Forktail: Sightings exist for the month of May

Black-fronted Forktail: Sightings exist for the months of May and June. The first ever confirmed specimen for Hidalgo County was photographed at the preserve on 1 June 2011

Mexican Forktail: Sightings exist for the months of May thru August, and October

Desert Firetail: Sightings exist for the months of June thru September. Male is on the left, female on the right

Flame Skimmer: Sightings exist for the months of April thru October

Twelve-spotted Skimmer: Sightings exist for the months of August thru October

Widow Skimmer: Sightings exist for the months of August and September

Blue Dasher:Sightings exist for the months of July thru September

Pale-faced Clubskimmer:Sightings exist for the months of September and October. The first ever confirmed specimen for Hidalgo County was photographed at the preserve on 9 September 2011.

Roseate Skimmer:Sightings exist for the months of May and October. The first ever confirmed specimen for Hidalgo County was photographed at the preserve on 13 May 2011

Halloween Pennant:Sightings exist for the month of August. The first ever confirmed specimen for Hidalgo County (and western New Mexico) was photographed at the preserve on 25 August 2011. The same individual was also observed two days later

Western Pondhawk: Sightings exist for the month of August

Variegated Meadowhawk: Sightings exist for the months of April thru November

Striped Saddlebags: A sighting exists for the month of October. The first ever confirmed specimen for Hidalgo County was photographed at the preserve on 11 October 2011

Red Saddlebags: Sightings exist for the months of April thru October. The first ever confirmed specimen for Hidalgo County was photographed at the preserve on 21 May 2011

Black Saddlebags: Sightings exist for the months of June thru October. The first ever confirmed specimen for Hidalgo County was photographed at the preserve on 4 July 2011

Common Whitetail: Sightings exist for the months of June thru October. The first ever confirmed specimen for Hidalgo County was photographed at the preserve on 27 June 2011. Female is on the left, male on right

Wandering Glider: Sightings exist for the months of May and June

Spot-winged Glider: Sightings exist for the month of August. The following image was taken by Shela Godfrey on the 1 August 2011. This is the first ever confirmed specimen for Hidalgo County.

Blue-eyed Darner: Sightings exist for the months of April thru October

Common Green Darner: Sightings exist for the months of March thru November. The first ever confirmed specimen for Hidalgo County was photographed at the preserve on 14 June 2011

Giant Darner: Sightings exist for the months of August and September. This is the first ever confirmed specimen for Hidalgo County.

Gray Sanddragon: Rare. A single sighting was the first ever confirmed specimen for Hidalgo County on 27 June 2011