Close-up of a male Pronghorm (Antilocapra americana). OK it's not technically an antelope - this species is most closely related to Giraffe and Okapi. Evolved, like the African antelope species, to outrun predators, this species proved very hearty and successful. They outlived the North American species of cheetahs that went extinct in pre-historic times. Incredibly fast (only the Cheetah achieves faster speeds on land), the Pronghorn have the added advantage of being able to sustain their top speed for miles. Custer State Park, The Black Hills, South Dakota.
Northern Cat-eyed Snake I was lucky enough to observe this past weekend in the Lower Rio Grande Valley region of Texas. This species is abundant throughout Central America; but in south Texas, the northernmost part of their range, they are very hard to come by.