Social attraction used to establish Caspian tern (Hydroprogne caspia) nesting colonies on modified islands at the Don Edwards San Francisco Bay National Wildlife Refuge, California—Final report

The two new large and growing Caspian tern nesting colonies demonstrate the effectiveness of decoys and electronic call systems in helping to establish colonies in #SanFranciscoBay.

Social attraction used to establish Caspian tern (Hydroprogne caspia) nesting colonies on modified islands at the Don Edwards San Francisco Bay National Wildlife Refuge, California—Final report https://t.co/lVb7WiyRMs https://t.co/R6VJ7Bvl5w

Social attraction used to establish Caspian tern nesting colonies on modified islands at the Don Edwards San Francisco Bay National Wildlife Refuge https://t.co/6zYtT4irhv | U.S. Geological Survey | #ornithology