Mammals
(click on any image for a larger view)

Bobcat
Bobcat
(Lynx rufus), winter, Coastal Fire Road, Mount Tamalpais State Park
View more bobcat photos

Elephant seal
Elephant seal (Mirounga angustirostris), late summer, Año Nuevo State Reserve

Harbor seal
Harbor seal
(Phoca vitulina), summer, in the waters off Arch Rock, Point Reyes

River otter
River otter
(Lutra canadensis), spring, Grizzy Island Wildlife Area

Wild pigs
Wild pigs
, autumn, Grant County Park

Chipmunk
Chipmunk
(Tamias), summer, Bear Valley Trail, Point Reyes

Coyote
Coyote
(Canis latrans), winter, Alto Bowl Open Space Preserve

Tule elk photo
Tule elk
(Cervus elaphus nannodes), spring, Estero Trail, Point Reyes National Seashore

Gray fox
Gray fox
(Urocyon cinereoargentus), Coyote Hills Regional Park
View more photos of the gray fox 

Jackrabbit
Jackrabbit
(Lepus), spring, Calero County Park

Mole
Mole (Scapanus), winter, Z Ranch Trail, Point Reyes

Gopher
Gopher (Thomomys), spring, Miwok Trail, Marin Headlands
Cottontail
Rabbit,
Estero Trail, Point Reyes National Seashore
View more rabbit photos
Mule deer
Mule Deer
(Odocoileus hemionus), Old Springs Trail, Marin Headlands
Squirrel
Squirrel, Los Cerritos Trail, Calero County Park
View more squirrel photos
You certainly will run into a fair amount of mammals out on the trails. In large part, what you see has to do with your behavior. Hiking with others, or with dogs, will decrease your meetings. But when you are quiet, careful, and observant, you may be astonished at what you see. Deer, coyotes, fox, elk, weasels, skunks, raccoons, bobcats, pigs, jackrabbits, badgers, bats, opossum, porcupines, and mountain lions all live, mostly secretly, in the bay area.
        If you are interested in learning more about the animals in our area, start by taking a look at some field guides. Here are a couple of good ones:

National Audubon Society Field Guide to North American Mammals, by John O. Whitaker, Jr. (order this book from Amazon.com)
Scats and Tracks of the Pacific Coast, by James C. Halfpenny (order this book from Amazon.com).
•  Peterson Field Guides:  Animal Tracks, by Olaus J. Murie (order this book from Amazon.com).

        The primary animal signs to look for are tracks and scat. And then you need to know where to look for the animals. Coyotes frequent open grassland, but usually only below the ridge line, so if you hike on ridge tops, look downhill to see them. Deer are common, but prevalent in the morning, and about dusk. Pigs love acorns, and can be seen rooting nearby oaks. To better your chances in sightings, hike quietly and stop frequently along areas of the trail. Just listen, and look around. Sometimes animals jump right out at you, but usually they want their privacy more than they want to mess around with you.
        For more information on dangers of wild animals, see my section on troubles with varmits.

Links:
CalPhotos http://elib.cs.berkeley.edu/photos/fauna/
coyote info  http://www.desertusa.com:80/june96/du_cycot.html
mountain lion info http://www.dfg.ca.gov/news/issues/lion.html



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