Hawai'i Creepers recorded per
party hr on the Volcano Christmas Count, Hawai'i,
1972-2014 (see Count
Page), perhaps indicating a cyclic
trend, with peaks in the late 1970s, late 1990s, and around 2010. 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/