Red-whiskered Bulbuls recorded per party hr on the Waipi'o Christmas Count,

O'ahu, 1977-2014 (see Count Page), showing increasing but fluctuating populations since first detected on the count in 1993.


Species account


Graphs of Christmas Count data developed as part of The Birds of the Hawaiian

Islands: Occurrence, History, Distribution, and Status by Robert L. Pyle and Peter Pyle