Northern Cardinals recorded per party hr on the Volcano Christmas Count, Hawai'i,

1972-2007 (see Count Page), showing a decline from 1990 through the 2000s,

following an increase from the 1970s through 1990

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/