Winter Food Habits of Grey-headed Green Woodpeckers Picus canus

Abstract

*[Fecal droppings of Grey-headed Green Woodpeckers, left in roosting nest boxes, were collected and analyzed from 20 October 1977 to 9 April 1978. The nest boxes were set up on the Forest Observation Tower in the Tomakomai Experiment Forest of Hokkaido University. Lasius niger was favored from Autumn to Winter I, then decreased in Winter II, & increased in Late Winter again.]