Nesting and foraging habitat of great gray owls

Publication Type:

Journal Article

Authors:

Bull, Evelyn L.; Henjum, Mark G.; Rohweder, Ronald S.

Source:

Journal of Raptor Research, Raptor Research Foundation, Volume 22, Issue 4, p.107-115 (1988)

Call Number:

A88BUL01IDUS

URL:

https://sora.unm.edu/node/53109

Keywords:

Abies grandis, Douglas-fir, grand fir, Great Gray Owl, Larix occidentalis, lodgepole pine, Pinus contorta, Pinus ponderosa, ponderosa pine, Pseudotsuga menziesii, Strix nebulosa, western larch

Abstract:

During 1982-1986, 46 Great Gray Owl (Strix nebulosa) nests were located in northeastern Oregon. Twenty-five of these nests were on stick platforms, 11 were on artificial platforms, and 10 were on broken-topped dead trees. Mean dbh and height of trees containing stick nests were 58 cm and 30 m, respectively, and the majority (76%) of nests were in live western larch (Larix occidentalis). Broken-topped dead trees with nests averaged 78 cm dbh and 11 m tall. Forest types in which nests were found included: Douglas-fir (Pseudotsuga menziesii)-grand fir (Abies grandis) (50%); western larch-lodgepole pine (Pinus contorta) (29%); ponderosa pine (Pinus ponderosa)-Douglas-fir (15%); and ponderosa pine (7%). Nesting males foraged primarily in mature, open stands (11-59% canopy closure) of ponderosa pine or Douglas-fir.

Notes:

Reference Code: A88BUL01IDUS

Full Citation: Bull, E. L., M. G. Henjum, and R. S. Rohweder. 1988. Nesting and foraging habitat of great gray owls. Journal of Raptor Research 22(4): 107-115.

Location: ANIMAL EF: STRIX NEBULOSA