The white speckled eggs belong to a brown-headed cowbird which is parasitizing a chipping sparrow's nest. The blue egg belongs to the sparrow. Both birds are native species to Montana. (Montana Fish, Wildlife & Parks photo)
August 4, 2021
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August 4, 2021 midnight
Cowbirds, nature's ultimate parasite
Ticks and mosquitoes come to mind, but do you think of a bird as a parasite?