Norbert Wu / Electric Catfish (Malapterus sp) at Steinhart Aquarium, San Francisco, California, native to Africa
01632749
Claudio Contreras / Prehistoric rock art with depiction of Pronghorn antelope. Boca de San Julio cave, San Francisco Sierra, El Vizcaino Biosphere Reserve, Baja California Peninsula, Mexico.
01632748
Claudio Contreras / Prehistoric rock painting at La Pintada cave, Pronghorn antelope, Bighorn sheep and people depicted, San Francisco Sierra, El Vizcaino Biosphere Reserve, Baja California Peninsula, Mexico.
01632747
Claudio Contreras / Prehistoric rock painting of Pronghorn antelope and people, at La Pintada cave. San Francisco Sierra, El Vizcaino Biosphere Reserve, Baja California Peninsula, Mexico.
01632746
Claudio Contreras / Prehistoric rock painting of Pronghorn antelope and people. La Pintada cave. San Francisco Sierra, El Vizcaino Biosphere Reserve, Baja California Peninsula, Mexico.
01632745
Claudio Contreras / Prehistoric rock painting of Pronghorn antelope and Turkey vulture. La Pintada cave. San Francisco Sierra, El Vizcaino Biosphere Reserve, Baja California Peninsula, Mexico, March
01632744
Claudio Contreras / Guide in front of prehistoric rock paintings of Bighron sheep and people. La Pintada cave, San Francisco Sierra, El Vizcaino Biosphere Reserve, Baja California Peninsula, Mexico.
00582532
Chase Dekker / Bobcat (Lynx rufus) with Botta's Pocket Gopher (Thomomys bottae) prey, Morgan Hill, California
00578748
Sebastian Kennerknecht / Snowy Plover (Charadrius nivosus) nest in restored salt pond with shells laid by biologists to increase camouflage possibilities for adults, Eden Landing Ecological Reserve, Union City, Bay Area, Cali...
00578747
Sebastian Kennerknecht / Snowy Plover (Charadrius nivosus) biologist, Karine Tokatlian, holding chick during banding, Eden Landing Ecological Reserve, Union City, Bay Area, California
00578618
Jaymi Heimbuch / Raccoon (Procyon lotor) juvenile in water, San Francisco, Bay Area, California
01592703
Emanuele Biggi / Arboreal salamander (Aneides lugubris) egg on white background, California, USA.