Tom Vezo / Barn Swallow (Hirundo rustica) chicks in nest, southeast Arizona
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Flip Nicklin / Humpback Whale (Megaptera novaeangliae) pod engages in cooperative gulp feeding on herring school, southeast Alaska
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Rolf Nussbaumer / RF- Female American Darter (Anhinga anhinga) drying wings on mangrove tree, Ding Darling National Wildlife Refuge, Sanibel Island, Florida, USA. December. (This image may be licensed either as rights...
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Rolf Nussbaumer / RF- Great Egret (Ardea alba) perched on root of Mangrove tree (Rhizophoraceae). Ding Darling National Wildlife Refuge, Sanibel Island, Florida, USA. December. (This image may be licensed either as rig...
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Flip Nicklin / White-tailed Deer (Odocoileus virginianus) doe at forest edge, southeast Alaska
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Flip Nicklin / Glacier showing age striations, southeast Alaska