*Oology is a branch of ornithology studying bird eggs, nests and breeding behaviour. The word is derived from the Greek oion, meaning egg.
22. American Robin
This part of the Stanislaus Audubon Website is focused on 44 common Central Valley nesting species with background about their nesting habits. Please check the Great Valley Museum Central Valley Egg Collection starting page for links to all the featured species.
AMERICAN ROBIN NESTING INFORMATION (From birdsoftheworld.org)
Nests - Males usually arrive at breeding sites a few days before females. Female constructs the nest, usually in 5–7 d for the first nests of the season. Working from inside, female constructs the outer wall with dead grass and twigs, pressing from inside with the wrist of her wing.
Eggs - Subelliptical to oval, Darker eggs are Nile blue and lighter ones deep bluish glaucous. Clutch size 3–4 eggs, rarely 5.
Incubation - incubation is typically 12–13 days. Male may bring food to incubating female, but this is unusual.
Fledging - Both parents feed nestlings and the young are fed regurgitated food for the first 4 d after hatching. ledge on about day 13
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