Avian Brood Parasitism: Variation in Host Repsonse
Obligate brood parasites forego the cost of parental care by laying their eggs in the nest of other species, often to the detriment of that species. About 1% of all bird species are obligate brood parasites, but the most well-known and commonly studied are the many cuckoo and cowbird species. Host species have been observed to endure the cost of parental care to raise the parasitic young, even though these young are not theirs and are therefore not contributing to their fitness. The host-parasite relationship has been studied for many years in an effort to determine why a host would raise the ...
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