Java Sparrows recorded per party hr on the Waipi'o
Christmas Count, O'ahu,
1977-2014 (see Count Page),
showing an increase since first detection on the count in 1983.
Graphs of Christmas
Count data developed as part of The Birds of the Hawaiian
Occurrence, History, Distribution, and Status by Robert L. Pyle and Peter Pyle http://hbs.bishopmuseum.org/birds/rlp-monograph/