Northern Shovelers recorded per party hr on the Honolulu Christmas

Count,O'ahu,1944-2007 (see Count Page). The drop in numbers since1960 reflects,

among other things, the loss of wetland habitat in se. O'ahu, in particular, the

draining of Kaelepulu Pond in 1954. See also Northern Pintail.

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/