Birds which reached Micronesia by way of the islands of Celebes and the
Moluccas may have been derived originally from Melanesia. The following
birds appear to have used this route: _Porphyrio porphyrio_, probably
_Halcyon chloris_, _Rhipidura lepida_, _Myiagra oceanica_, _Zosterops
conspicillata_, and _Z. cinerea_. These birds apparently became
established initially in the Palaus; _Porphyrio_ and _Rhipidura lepida_
have not been recorded elsewhere in Micronesia, but _Myiagra_ and the
two species of _Zosterops_ have spread to the Carolines and Marianas,
although not into the Marshall Islands. Wind from the southeast in
summer and fall has probably been a factor aiding these colonizations.
The population of _Gallinula chloropus_ resident at Palau may also have
arrived by this route.