Jaymi Heimbuch / Coyote (Canis latrans) female in city, San Francisco, Bay Area, California

Sebastian Kennerknecht / Snowy Plover (Charadrius nivosus) biologist, Ben Pearl, picking up chick from mud flat in salt pond, Eden Landing Ecological Reserve, Union City, Bay Area, California

Gavin Hellier / Timelapse from day to night of vehicles driving across the Golden Gate Bridge, San Francisco, California, USA, 2011.

Gavin Hellier / Timelapse of advection fog rolling in under the Golden Gate Bridge, San Francisco, California, USA, 2011.

Gavin Hellier / Panoramic view of the foggy skyline of San Francisco at sunrise, California, USA 2011

Jack Dykinga / Sunset Crater National Monument with dawn light on the San Francisco Peaks over fields of flowering Prairie sunflowers (Helianthus petiolaris) Arizona

Patricio Robles Gil / Ancient cave paintings of people, deer and wild sheep, Sierra de San Francisco, Baja California, Mexico

Sebastian Kennerknecht / Burrowing Owl (Athene cunicularia) at burrow, Berkeley, San Francisco Bay, California

Sebastian Kennerknecht / San Francisco Garter Snake (Thamnophis sirtalis tetrataenia) on pond vegetation, Pescadero, California

Claus Meyer / Blacktail Piranha (Pygocentrus piraya) underwater portrait, Amazon, Brazil

Konrad Wothe / Blacktail Piranha (Pygocentrus piraya) on hook showing sharp teeth, Pantanal, Brazil

Norbert Wu / Electric Eel (Electrophorus electricus) can generate up to 220 volts, freshwater, Steinhart Aquarium, San Francisco, California