Practice Using Dichotomous Keys

 

1a Brownish - gray colored horns or antlers Go to 2
1b Black colored horns Go to 3
2a Tip of horn curls or arc, male and female Bighorn Sheep
2b

Branched antlers, male only

 Mule Deer
3a Body tri-colored (brown,cream,black) Pronghorn (antelope)
3b Body dark brown all over American Bison

 

1. According to the key, the animal pictured above is a-

Bighorn Sheep
Mule Deer
Pronghorn (antelope)
American Bison