Yellow-fronted Canaries recorded per party hr on the
Honolulu Christmas Count, 1944-2014 (see Count
Page), showing a slow population expansion
during the 1970- 1980s followed by fluctuating populations in the 1990-2010s.
See also Moulton and Scioli (1986) 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/