resident land birds and fresh-water birds, all of which are endemic, including one family, 23 genera and 36 species. The North American night heron, _Nycticorax n. hoactli_, may be included in this list as the only resident which is undifferentiated. The development of full specific differentiation within the resident avifauna is greater in the more isolated Hawaiian chain where 49 percent of these birds are regarded as endemic species, while in Micronesia, which is less remote from other bodies of land, the specific endemism is only 32 percent. TABLE 12. ENDEMISM IN FAMILIES OF NATIVE LAND AND FRESH-WATER BIRDS IN MICRONESIA ==================+===========+=========+=========+============+========= | | Endemic | Endemic | Endemic | Total FAMILY | Residents | genera | species | subspecies | endemic ------------------+-----------+---------+---------+------------+--------- Phalacrocoracidae | 1 | 0 | 0 | 0 | 0 Ardeidae | 3 | 0 | 0 | 1 | 1 Anatidae | 2 | 0 | 1 | 0 | 1 Accipitridae | 1 | 0 | 0 | 0 | 0 Megapodidae | 2 | 0 | 1 | 2 | 2 Rallidae | 7 | 1* | 2 | 4 | 6 Columbidae | 13 | 0 | 4 | 11 | 13 Psittacidae | 1 | 0 | 1 | 0 | 1 Strigidae | 2 | 0 | 1 | 1 | 2 Caprimulgidae | 1 | 0 | 0 | 1 | 1 Apodidae | 5 | 0 | 1 | 5 | 5 Alcedinidae | 7 | 0 | 1 | 7 | 7 Campephagidae | 3 | 0 | 0 | 3 | 3 Corvidae | 1 | 0 | 1 | 0 | 1 Sylviidae | 5 | 1 | 2 | 4 | 5 Muscicapidae | 14 | 1 | 6 | 9 | 14 Artamidae | 1 | 0 | 0 | 1 | 1 Sturnidae | 9 | 0 | 3[+] | 7 | 9 Meliphagidae | 7 | 1 | 1 | 6 | 7 Zosteropidae | 14 | 1 | 6 | 10 | 14 Ploceidae | 5 | 0 | 0 | 4 | 4 +-----------+---------+---------+------------+--------- Totals | 104 | 5 | 31 | 76 | 97 ------------------+-----------+---------+---------+------------+--------- * _Aphanolimonasa_ is included but may be extinct. [+] _Aplonis corvinus_ is included but may be extinct.