Common cuckoo of two years. More than 100 host species have been recorded: meadow pipit, dunnock and Eurasian reed warbler are the most common hosts in northern Europe; garden warbler, meadow pipit, pied wagtail and European robin in central Europe; brambling and common redstart in Finland; and great reed warbler in Hungary. Female common cuckoos are divided into gentes – groups of females favouring a particular host species' nest and laying eggs that match those of that species in color and pattern. Evidence from mitochondrial DNA analyses suggest that each gene may have multiple independent origins due to parasitism of specific hosts
International Bird Rescue International Bird Rescue Research Center, the organization cares for an estimated 5,000 birds annually at two rehabilitation centers, the Los Angeles Oiled Bird Care and Education Center and the San Francisco Bay Oiled Wildlife Care and Education Center, that also serve as primary care facilities for oiled birds in the event of a spill in California. Common bird species treated include brown pelicans, common murres, western grebes, pacific loons, and a variety of gulls, herons, and other waterfowl. International Bird Rescue is a member of the Oiled Wildlife Care Network (OWCN), which is managed by the UC Davis School of