Hawaiian Coots recorded per party hr on the Kapa'a Christmas Count, 1971-2007 (see Count
Page), showing a declining trend,
opposite to that of the Waipi'o Christmas Count. These trends may
relate to local wetland conditions and/or increased emigration of birds
from Kaua'i to O'ahu.
Fluctuations in numbers apart from the trends reflect
favorable and unfavorable conditions for breeding, as related primarily to rainfall totals
(see also Common Moorhen and Hawaiian Stilt). 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 http://hbs.bishopmuseum.org/birds/rlp-monograph/2009/