National Geographic Sights & Sounds, The Bering Sea
http://www.nationalgeographic.com/wildworld/beringsea/index.html

National Geographic Sights & Sounds, Southwestern Amazonian Moist Forest
http://www.nationalgeographic.com/wildworld/amazon/index.html

Or choose one of the Animal Profiles from the center of the National Geographic Animals and Nature page
http://www.nationalgeographic.com/animals/

Orca Live
http://www.orca-live.net/
Live cam with clips of orcas available only seasonally

Animal Cams
http://nationalzoo.si.edu/Animals/WebCams/default.cfm
(check the individual cameras to narrow your focus to choices appropriate for your students)

 

Interactive Sound Chart
http://interactives.mped.org/chart69.aspx