North Coast and Cascades Network landbird monitoring: Report for the 2010 field season
Holmgren AL , Wilkerson RL, Siegel RB, Kuntz RC. 2011. North Coast and Cascades Network landbird monitoring: Report for the 2010 field season. Natural Resource Technical Report. NPS/NCCN/NRTR—2011/473. National Park Service, Natural Resource Stewardship and Science. Fort Collins, Colorado
In 2010 we conducted 845 point counts at point count survey stations located along 65 transects in the three large parks of the North Coast and Cascades Network, including Mount Rainier National Park (MORA), North Cascades National Park Service Complex (NOCA), and Olympic National Park (OLYM). Three of the 68 intended transects could not be surveyed due to late lingering snowpack at two high elevation survey areas and at one area because of a permanent closure of the trail. We detected 141 bird species in the three large parks, 83 of which were detected during one or more point counts. For 57 species (all species detected at least 18 times on annual-panel transects between 2005 and 2010), we present the total number of detections on annual-panel transects in each park during the 2005-2010 field seasons. These detection totals have not been adjusted for differences in survey effort or potential differences in detectability of birds between years; such adjustments will be made in conjunction with trend analyses in our five-year report. At Lewis and Clark National Historical Park (LEWI), we conducted 71 point counts, including 37 at Cape Disappointment, 29 at Fort Clatsop, and five at Sunset Beach. Our field crew detected 72 species while in the park, 63 of which were detected during point counts. We present the number of detections, and the number of point count stations with detections, for each species detected during point counts at LEWI. After the overall decrease in the number of birds detected in 2009 in the large parks, 2010 yielded an overall increase in detections, notably at NOCA. More specifically, there was a slight decrease in detections at MORA (averaging 5.41 detections per point on annual-panel transects in 2009, compared with 4.81 detections per point in 2010), a slight increase in detections per point at OLYM (averaging 5.79 detections per point on annual-panel transects in 2009, compared with 6.40 detections per point in 2010), and a substantial increase in detections per point at NOCA (averaging 7.32 detections per point on annual-panel transects in 2009, compared with 10.46 detections per point in 2010). This increase was in large part driven by the increase of Evening Grosbeaks at NOCA, rising from 40 detections on annual-panel transects in 2009 to 164 detections in 2010 (compared with 53 detections in 2007 and 75 detections in 2008), even with fewer points surveyed in 2010.
- Type
- Published Report
- Authors
- Holmgren, Amanda; Wilkerson, Robert; Siegel, Rodney; Kuntz, Robert
- Date of Issue
- 2011-07
- Publisher
- National Park Service, Natural Resource Stewardship and Science
- Units
- LEWI , MORA , NOCA , NRSS , OLYM
- Keywords
- Abundance, alternating panel, annual panel, annual report, Avian, Biology, Bird, Density, Detectability, Distribution, landbird monitoring, Lewis and Clark National Historical Park, Monitoring, Mount Rainier National Park, NCCN, North Cascades National Park Complex, North Coast and Cascades Network, Observation, Olympic National Park, Point Count, Presence, Transect, Trend