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| Dates: |
June every year. Teams conduct point counts from June 1 - 30. |
| Locations: |
Multiples sites in the Northern Virginia Area |
| Contact: |
ASNV at
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or 703-438-6008 |
Conducted annually since 1994, this comprehensive, long-term survey of breeding birds takes place at over 600 points in more than 25 designated areas, including many parks and other conservation sites, throughout the region. A standardized point count methodology is used to closely monitor and assess bird populations and trends.
The 18th annual Northern Virginia Bird Survey (NVBS), ASNV’s comprehensive breeding bird count, took place last June. Many thanks to the forty-three volunteers (nine new to the NVBS) who collected data at 643 grid points located at more than twenty-five sites and counted 9,931 birds representing 99 species. Since the survey began, 175,141 birds have been counted. With the addition of 5,780 new Excel records this year, the database now contains 96,115 records each with detailed count information about a single species at a single survey point.
Northern cardinal was the top species in both numbers and distribution and was followed by tufted titmouse. American robin and red-eyed vireo came in third in numbers and distribution respectively. Crow numbers remained low and were not significantly different from last year. No new species were added this year so the total number of species for the life the survey remains at 151. Species encountered in 2011 but not in 2010 included common merganser, black duck, yellow-crowned night-heron, willow flycatcher, rose-breasted grosbeak, and black-throated green warbler. Present in 2010 but not this year – ring-billed gull, Caspian tern, hooded merganser, spotted sandpiper, American kestrel, and marsh wren.
We are in the process of updating the population trends of representative species reported in our book Birds in Northern Virginia: Documenting the Nature of Change: The Northern Virginia Bird Survey by incorporating the data from the 2006-2010 surveys. We hope to publish this information soon.
2010:
2009:
2008:
2007:
2006:
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