Cooperative Research Units
Education, Research And Technical Assistance For Managing Our Natural Resources
Home | Intranet | Digital Measures | Help

Cause of low nesting success and recruitment of Clark's and Western Grebes in Idaho

Duration

June 2017 - December 2019

Narrative

Clark’s grebes are uncommon in North America and abundance has declined significantly over the past 50 years. Data from the North American Breeding Bird Survey (BBS) suggest 1.6% annual declines from 1966-2013 rangewide for Clark’s and western grebes (Sauer et al. 2014). Estimates for the number of western grebes (110,000) and Clark’s grebes (20,000) in North America are based partly on peak counts reported during the National Audubon Society’s Christmas Bird Counts (CBC) (Kushlan et al. 2000, 2002; National Audubon Society 2004). No comprehensive surveys of nesting sites have been conducted. Because of their rarity and their continued population declines, Clark’s grebes were included on a recent list of birds in North America that are most in need of conservation action (State of the Birds Watch List; Rosenberg et al. 2014). The western grebe is a candidate species for listing as threatened or endangered in Washington, and Clark’s grebes are a species of concern in Arizona, Montana and Wyoming (Ivey and Herziger, in Ivey 2004).

 

Current Staff

Federal Staff: 102

Masters Students: 247

Phd Students: 163

Post Docs: 55

University Staff: 266

5 Year Summary

Students graduated: 722

Scientific Publications: 1960

Presentations: 4355

 

Personnel

Funding Agencies

  • US Geological Survey

Links

Cooperative Research Units Program Headquarters Cooperators