Sunday, July 26, 2009

Life of a parent - brood-parasitism

Searching....
Got a worm!

Forever hungry

Yesterday and today a pair of Spot-Breasted Orioles have been accompanied by their adopted kid (cowbird, most likely Bronzed). The parents have been very busy collecting little green worms that they are getting from the underside of leaves in the trees and brushes. Occasionally the adults have been eating mango from the neighbors' tree.

Cowbirds are one of the species that are brood parasites. This means they will remove a host egg when they lay one of their own in a nest. This can happen either in the same visit to the host nest or in a separate visit before or after the parasitism. This both prevents the host species from realizing their nest has been parasitized and reduces competition for the parasitic nestling once it hatches.

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