Abstract
We wanted to identify the types of trees and habitat used by pileated woodpeckers (Dryocopus pileatus) for roosting, and to develop management guidelines to provide this habitat. Thus, we located 123 roost trees used by 22 pileated woodpeckers and observed their roosting behavior in northeastern Oregon, 1989-90. In all 443 instances, adult pileated woodpeckers roosted inside a cavity at night. The majority (62%) of the roosts were in grand fir (Abies grandis), both live and dead, that were extensively decayed by Indian paint fungus (Echinodontium tinctorium). The decay had created a hollow chamber inside the tree that averaged 4.3 m long (SE=0.22) and 28 cm (0.29) wide where birds roosted
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