The interaction between a cowbird and a chipping sparrow is of brood parasitism.
The mother cowbird has brood parasitism behavior where it lays its eggs in a nest of another bird (sparrow). When all the eggs hatch, the sparrow then feeds its chicks together with the cowbird chick.
The brown-headed cowbird, is a small bird of the family Icteridae. Like other cowbirds (genus Molothrus) it also lays its eggs in the nests of other species.
Brown-headed Cowbirds are native to North America and many people consider them a nuisance bird, since they destroy the eggs and young of smaller songbirds.
To learn more about brood parasitism, here
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