*Oology is a branch of ornithology studying bird eggs, nests and breeding behaviour. The word is derived from the Greek oion, meaning egg.
30. Barn Owl
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.
BARN OWL NESTING INFORMATION (From birdsoftheworld.org)
Nests - In California, most clutches begin in Feb. Uses cavities of wide variety in trees, including hollows of palm trees, cliffs, rock outcrops, caves, and river/arroyo banks. Most females arrange a cup of their own shredded pellets to receive the eggs.
Eggs - Short subelliptical, dull white; often heavily blackened from nest lining during incubation. Clutch size 5 to 7 (range 2 to 18).
Incubation - 29–34 days, male feeds incubating female.
Fledging - Young are altricial (naked, eyes closed) and nidicolous (stay in nest). Male brings food to the nest but only female feeds the young. First flight at 50–55 days of age.
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