Dunnock system can be shifted from one that favours female success (polyandry), to one that promotes male success (monogamy, polygynandry, or polygyny). The dunnock builds a neat nest (predominantly from twigs and moss and lined with soft materials such as wool or feathers), low in a bush or conifer, where adults typically lay three to five unspotted blue eggs. Broods, depending on the population, can be raised by a lone female, multiple females with the part-time help of a male, multiple females with full-time help by a male, or by multiple females and multiple males. In pairs, the male and the
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