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Western Ecological Research Center (WERC) images.

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Pinecone with tightly closed scales attached near the top of a pine tree.
Closed lodgepole pinecone
Closed lodgepole pinecone
Closed lodgepole pinecone

A closed lodgepole pinecone on a tree in the Sierra Nevada.

Image: Juvenile Mountain Yellow-legged Frog
Juvenile Mountain Yellow-legged Frog
Juvenile Mountain Yellow-legged Frog
Image: Releasing Endangered Tadpoles into Stream
Releasing Endangered Tadpoles into Stream
Releasing Endangered Tadpoles into Stream
Releasing Endangered Tadpoles into Stream

USGS scientist, Adam Backlins, prepares to make the first-ever release of endangered mountain yellow-legged frog tadpoles into a mountain stream.

USGS scientist, Adam Backlins, prepares to make the first-ever release of endangered mountain yellow-legged frog tadpoles into a mountain stream.

A Forster's tern chick near an two eggs near San Francisco Bay.
Forster's Tern Chick With Eggs
Forster's Tern Chick With Eggs
Forster's Tern Chick With Eggs

A Forster's tern chick with eggs near San Francisco Bay.

A fluffy brown chick stands on a rocky surface next to two yellowish eggs mottled with brown spots
Forster's Tern Chick With Two Eggs
Forster's Tern Chick With Two Eggs
A fluffy brown chick stands on a rocky surface next to a yellowish egg mottled with brown spots
Forster's Tern Chick With Egg
Forster's Tern Chick With Egg
Image: Sampling Forster’s Tern Chicks for Avian Influenza Study
Sampling Forster’s Tern Chicks for Avian Influenza Study
Sampling Forster’s Tern Chicks for Avian Influenza Study
Sampling Forster’s Tern Chicks for Avian Influenza Study

Scientists sampling Forster's Tern chicks for avain influenza during salt pond restoration work in south San Francisco Bay salt ponds.

Image: Annie Schultz and Kathy Baumberger Process Forster's Terns Chicks
Annie Schultz and Kathy Baumberger Process Forster's Terns Chicks
Annie Schultz and Kathy Baumberger Process Forster's Terns Chicks
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