Thursday, August 26, 2004

Passeriform, Incubation and parental care

Passerines lay clutches of one to 14 eggs, clutch size being unrelated to the size of the bird. The largest species, the two lyrebirds (Menura), lay a single egg; some of the smaller titmice (Parus) have been recorded with the biggest clutches. In most passerines the female incubates the eggs alone, but in some groups - such as the antbirds (Formicariidae), certain grosbeaks (Pheucticus


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