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Treasure in the Trees: Scientific Clues in Birds' Nests [Slide Show]

Nests offer clues about natural history, climate change and their owners' mating habits

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Field notes:

House Wren (California, 1974); twigs, fine grass, skeletons of abandoned runt chicks.....[ More ]

Field notes:

Western Tanager (Nevada, 1934); twigs, bark, pine needles, animal hair....[ More ]

Field notes:

MacGillivray’s Warbler (California, 1920); Field notes: grass inside bark....[ More ]

Field notes:

American  Dipper (California, 1951); moss, grass, leaves, bark....[ More ]

Field notes:

Gray Jay (Colorado, 1938); twigs, cocoons, lichen, bark, fur, feathers....[ More ]

Field notes:

Spotted Nightingale Thrush (Mexico, 1968); moss, lichen, leaves....[ More ]

Field notes:

Verdin (Mexico, 1961); prickly twigs, spiderweb....[ More ]

Field notes:

Small Ground Finch (Galápagos ­Islands, 1906); grass, twigs, wild cotton....[ More ]

Field notes:

House Finch (Arizona, 1965); thread, ­paper, twist ties.....[ More ]

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