Birds, blooms, and evolving diversity
Fig 2
Species of birds with different social systems.
(a) Blue tit Parus caeruleus young leave their parents after nutritional dependency ends and do not engage in cooperative breeding, (b) the Siberian jay Perisoreus infaustus is a family-living species without cooperative breeding, (c) apostlebird Struthidea cinereal offspring stay with their parents and help rear subsequent broods, and (d) the guira cuckoo Guira is an example of the rare case in which cooperative breeding involves nonkin individuals. Image credit: doi: 10.1371/journal.pbio.2000483.