Night-calling bird survey 2002-2004, Grand Portage National Monument
Gucciardo LS and Cooper DJ. 2008. Night-calling bird survey 2002-2004, Grand Portage National Monument. Natural Resource Technical Report. NPS/GLKN/NRTR—2008/134. National Park Service. Fort Collins
The initial bird inventory for Grand Portage National Monument was derived from limited field sampling in 1992-1994 and breeding bird surveys begun in 1997. As a result, species not present during the spring breeding season or which do not normally call during early morning hours had not been adequately sampled within the Monument. This project addressed one portion of this information gap by funding night-calling bird surveys from 2002 through spring 2004. Standardized methods were used to assess the presence and relative abundance of owl species, and limited informal sampling was used to detect the presence of other night-calling species in suitable habitats. The presence of three owl species (Great Horned, Barred, and Northern Saw-whet owls) in or near Monument property during the early spring nesting season were verified. Observations also suggest that two additional species (Great Gray and Boreal owls) may be present in the vicinity, at least in some years. Other night-calling species documented by this study include Ruffed Grouse, American Woodcock, Wilson's Snipe, Common Nighthawk, and Sora.
- Type
- Published Report
- Authors
- Gucciardo, L.; Cooper, David
- Date of Issue
- 2008-11-10
- Publisher
- National Park Service
- Units
- GLKN , GRPO , NRSS
- Keywords
- Absence (Biodiversity), Birds, Boreal, Grand Portage National Monument, landbird inventory, Minnesota, Owls, Presence (Biodiversity), Taxa List Only