Spotted Doves recorded per party hr on the Honolulu
Christmas Count, 1944-2014 (see Count
Page), indicating a significantly increasing
trend overall, but including a decline from about 1990 through the early 2010s. See
also Williams (1987) and Ralph (1990). 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/