Bald Eagle The female northern bald eagle is larger than the male, averaging 10 to 14 pounds. Males generally weigh 8 to 10 1/2 pounds. The size difference allows the pair to exploit different size prey. The bald eagle stands 2 1/2 to 3 feet tall with an impressive 6 l/2 to 7 1/2-foot wingspan. Their keen eyesight is eight times more powerful than a human's. The bright yellow feet of adults are strong, unfeathered and equipped with long, sharp, black talons for penetrating and grasping prey. The powerful, bright yellow, hooked bill is used for tearing and dismembering prey. The adult bald eagle is unmistakable, its white head and tail contrasting sharply with its dark body. However, a bald eagle in its first four years of life is predominantly dark brown with varying amounts of white, especially on its undersurface, and immature bald eagles are often mistaken for golden eagles (Aguila chrysaetos).

Mule Deer Desert mule deer, also known as "black-tail deer", are found in rugged, desert regions of western North America, including the Texas Panhandle and western portions of the state. They are closely related to the Rocky Mountain subspecies, which inhabits mountainous wooded areas. Distinctive features of mule deer are a black-tipped tail, white rump patch, and erect, nine-inch-long ears. Their hide is rusty brown in the summer, and gray in winter, with white undersides year-round.

Bighorn Sheep largest and best-known wild sheep of the North American continent, also called Rocky Mountain sheep. Bighorn sheep have large, curved horns, which may take more than one turn. Their coat is long, full, and coarse. Except during the short mating season, bighorns generally divide into separate male and female herds. They leap at great speed; grip slippery surfaces with shock-absorbing, elastic padded feet; and have acute senses of sight, smell, and hearing.

Western Rattlesnake Western Diamondbacks can attain a length of seven feet, but the average size is between three and four feet. The rattle is the most distinguishing feature of the snake, and is a horny section at the end of the tail, which serves to scare off intruders. After each molt, the rattle of the snake will gain a new section in the rattle. However, adequate information about the age of the rattlesnake cannot be determined by counting the sections of the rattle, as it may have been broken or the snake may have shed more than once a year.