What is a Mammal?


Mammals are animals that are born with fur or hair. Mammals produce live young which they nourish with milk. They are warm-blooded and have the most highly developed nervous system of all the animals. A mammal usually has four limbs and a four-chambered heart. The largest mammal is the blue whale at 100 feet in length. The smallest mammals are shrews, mice, and bats. Many are less than two inches long, excluding the tail length.

Click on the name of the animal below to see a picture of its tracks and some natural history information about it. I have also included some personal notes about each species. The species below are primarily those that can be found in northern California and the west. Some of them are found throughout the U. S. As I do more research, I will add species that are found in other areas. Keep checking this page for updates.



Black Bear Grizzly Bear
Beaver Bobcat
Domestic Cat Townsend’s Chipmunk
Coyote Black-tailed Deer
Elk Gray Fox
Red Fox Harbor Seal
Black-tailed Jackrabbit Mountain Lion
Mink Deer Mouse
Opossum River Otter
Wild Pig Porcupine
Brush Rabbit Raccoon
Ringtail Spotted Skunk
Striped Skunk Douglas' Squirrel
Gray Squirrel Gray Wolf
Moose Domestic Dog
California Vole Domestic Cattle
Dusky-Footed Woodrat Armadillo
Long-tailed Weasel Black Rat or Roof Rat
Bats Bison
Northern Flying Squirrel Wild Horse
California Ground Squirrel Pine Marten
Domestic Horse Coast Mole
Botta's Pocket Gopher Western Harvest Mouse
  Kangaroo Rats
Sonoma Tree Vole
White-Tailed Antelope Squirrel
Abert's Squirrel

prints prints

Got a mammal story? E-mail me and tell me about it.

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Back to the Animal Tracks Den


Copyright © 1997, 2008, 2018. Text and drawings by Kim A. Cabrera


Find all kinds of mammal posters, greeting cards, postage stamps and more in my new store.

Visit Beartracker's Nature Store at:   Happy tracking!!

What else can you find in the nature store? Beartracker's T-shirts, sweatshirts, journals, book bags, toddler and infant apparel, mouse pads, posters, postcards, coffee mugs, travel mugs, clocks, Frisbees, bumper stickers, hats, stickers, and many more items. All with tracks or paw  prints, or nature scenes. Custom products are available. If you don't see the track you want on the product you want, email me and I can probably create it. Proceeds from all sales go to pay the monthly fees for this web site. You can help support this site as well as get great tracking products! Thank you!


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Also visit these fine stores for more products of interest:

NDN Pride shop - For Indian Pride items for all tribes. Custom items available on request.

ASL Signs of Love - For anyone who uses or is learning ASL, American Sign Language. Custom name items and more are available here.

Get Every Child Outdoors (Get E.C.O.) - My shop dedicated to nature and getting kids interested in nature and the outdoors.

Sales from all stores give commissions to Beartracker's Animal Tracks Den, which helps keep this site online as a free service. We are celebrating ten years online this year!



Page updated on: March 24, 2018.

Copyright © 1997, 2008, 2018. Text, drawings, and photos by Kim A. Cabrera - Desert Moon Design