Hawaiian Hawks recorded per party hr on the Volcano Christmas Count, Hawai'i,

1972-2007 (see Count Page), showing a non-significant increasing trend during this

period.

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 http://hbs.bishopmuseum.org/birds/rlp-monograph/2009/