Translator Disclaimer
1 September 2017 First Nest Records of Northern Hawk Owls (Surnia Ulula) In Montana, With Notes On Behavior and Food Habits
Author Affiliations +
Abstract

In 1994, Steve Gniadek (SJG) located a Northern Hawk Owl (Surnia ulula) nest in Glacier National Park (GNP), Montana. This was the 1st nest found in Montana and the northwestern United States. Prior to this discovery, only 3 states in the contiguous United States (Minnesota, Michigan, and Wisconsin) had breeding records for this species. Historical evidence suggests that Northern Hawk Owls previously bred in Montana. A photo taken in 1990 of a misidentified fledgling in GNP is the 1st verified breeding record. Subsequent breeding has been documented in the vicinity of the 1994 nest, and elsewhere in Montana and the northwestern US. The 1994 nest cavity was 13.7 m high in a 42-cm diameter-at-breast-height (DBH) dead Trembling Aspen (Populus tremuloides), in an area that burned at moderate to high intensity in 1988. At least 7 nestlings fledged. Based on pellet analysis, the adults ate predominantly voles (Cricetidae, 96.3%), and they were observed to pluck and cache their prey.

Steve J Gniadek and Denver W Holt "First Nest Records of Northern Hawk Owls (Surnia Ulula) In Montana, With Notes On Behavior and Food Habits," Northwestern Naturalist 98(2), 117-121, (1 September 2017). https://doi.org/10.1898/NWN16-11.1
Received: 10 March 2016; Accepted: 1 October 2016; Published: 1 September 2017
JOURNAL ARTICLE
5 PAGES


SHARE
ARTICLE IMPACT
RIGHTS & PERMISSIONS
Get copyright permission
Back to Top