Adult Red-footed Boobies counted primarily at the Ulupau Head (KMAC) breeding

colony, as recorded on the Honolulu Christmas Count, O'ahu, 1947-2014 (see

Count Page). Numbers show a decline from the 1950s to the mid-1980s and then an increase into the 2010s.


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