[Illustration: FIG. 3. The Palau Islands.]
The Palau Islands (also called Arrecifos, Palaos, Paleu, Pally,
Paloc, Pannog, Parao, Pelew) consist of 8 large islands, 18 smaller
islands, and a large number of minute islets, all enclosed in a
single reef system. The northern islands (Babelthuap and Koror) are
of volcanic origin; the southern islands (Peleliu and others) are
of coralline formation. Angaur, to the south of Peleliu, may be
included with the Palau Archipelago. From the standpoint of the
avian zoogeography, the coral islands or atolls of Kayangel, Merir,
Pulo Anna, Sonsorol, and Tobi are also included. The principal
islands, shown in figure 3, are listed below:
_Arakabesan_ (also called Ngarekobasang).
_Aurapushekaru_ (also called Aburashokoru, Auluptagel, Oluksakel,
Oropu-shakaru).
_Babelthuap_ (also called Babeldzuap, Babel Taob, Babelthouap,
Baberthaob, Baberudaobu, Babldaob).
_Eil Malk_ (also called Amototi, Cogeal, Irakong, Makarakaru).
_Garakayo_
_Koror_ (also called Coror, Goreor, Kororu).
_Malakal_ (also called Amalakell, Malaccan, Marakaru, Nanalake).
_Ngabad_
_Ngesebus_ (also called Guadokusu).
_Peleliu_ (also called Pelelew, Periryu, Pililer, Peliliu, Uler).
_Urukthapel_ (also called Cape, Kuapasungasu, Ngurukdapel, Ulugeang,
Uruk-taaburu, Uruktapi).
Included with the Palau group because of proximity and relationships of
the avifauna are the following:
_Angaur_ (also called Angauru, Angyaur, Ngaur, Ngeour, N'Yaur).
_Kayangel_ (also called Kadjangle, Kajanguru, Kazyanguru, Kianguel,
Kreiangel, Moore, Ngajangel, Ngeiangel).
_Merir_ (also called Marir, Meliel, Meriel, Meriru, Pulo Marier, Warren
Hastings).
_Pulo Anna_ (also called Anna, Bul, Bur, Current, Paola, Pul, Puru,
Wull).
_Sonsorol_ (also called St. Andrew, San Andreas, Sonesor, Songosor,
Sonseron, Sonsol, Sonsoru, Tschontil).
_Tobi_ (also called Codopuei, Johnstone, Kadogubi, Lectobis, Lord North,
Nevil, Togobei, Tokobei).