These warm-blooded animals have backbones, grow hair or fur, breathe air, and have three middle ear bones. Another important characteristic is the presence of mammary glands used for producing milk for feeding young. Mammals include dogs, deer, and humans!

Columbian Black-Tailed Deer
Odocoileus hemionus
photo credit: Michael O’Loughlin

Common Raccoon
Procyon lotor
photo credit: Darian Santner

Coyote
Canis latrans
photo credit: Darian Santner

North American Porcupine
Erethizon dorsatum
photo credit: Michael O’Loughlin

North American River Otter
Lontra canadensis
photo credit: Darian Santner