Every spring I get reports from astonished readers describing a small bird feeding a much larger, obviously begging chick. Can you explain this, readers ask. The answer is “brood parasitism.” ...

Many species of birds get reputations of various sorts. One species that gets a bad rap, through no fault of its own, is the brown-headed cowbird. The female cowbird lays its eggs in the nests of ...

Forbes contributors publish independent expert analyses and insights. GrrlScientist writes about evolution, ecology, behavior and health. Most birders don’t much like cowbirds because the adults lay ...

One of the most interesting topics discussed in my Ornithology class was about the “con artists” found in nature… Brood parasitism occurs when a female bird (the parasite) lays her eggs in the nest of ...