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  5. Observations on a 40-Year January Bird Census in Boone County, Nebraska, 1978-2017

Observations on a 40-Year January Bird Census in Boone County, Nebraska, 1978-2017

af Wayne Mollhoff
Observations on a 40-Year January Bird Census in Boone County, Nebraska, 1978-2017 af Wayne Mollhoff
Bag om Observations on a 40-Year January Bird Census in Boone County, Nebraska, 1978-2017

For 40 years Wayne Mollhoff conducted a personal bird census every January. He explains: "After having run several Breeding Bird Survey routes, and participated in several Christmas Bird Counts, I became curious to see what might be found on a winter count under the more tightly controlled parameters of a census, as contrasted with Christmas counts done with variable numbers of observers." The count was set up similarly to the USGS Breeding Bird Survey routes with 50 stops, one-half mile (800 meters) apart, all birds counted for 3 minutes, with birds counted at one stop not counted again at following stops. The census route ran from the northwest corner of Boone County, along Beaver Creek, to a point outside Albion. Counts began at local sunrise. A total of 73 species were recorded during the 40-year census. This paper records those results and offers observations on patterns of occurrence or absence and changes in frequency. A Nebraska Ornithologists' Union Occasional Paper

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  • Sprog:
  • Engelsk
  • ISBN:
  • 9781609623012
  • Indbinding:
  • Paperback
  • Sideantal:
  • 34
  • Udgivet:
  • 13. september 2023
  • Størrelse:
  • 140x2x216 mm.
  • Vægt:
  • 58 g.
  • 2-3 uger.
  • 22. januar 2025
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Forlænget returret til d. 31. januar 2025
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Beskrivelse af Observations on a 40-Year January Bird Census in Boone County, Nebraska, 1978-2017

For 40 years Wayne Mollhoff conducted a personal bird census every January. He explains:
"After having run several Breeding Bird Survey routes, and participated in several Christmas Bird Counts, I became curious to see what might be found on a winter count under the more tightly controlled parameters of a census, as contrasted with Christmas counts done with variable numbers of observers."
The count was set up similarly to the USGS Breeding Bird Survey routes with 50 stops, one-half mile (800 meters) apart, all birds counted for 3 minutes, with birds counted at one stop not counted again at following stops. The census route ran from the northwest corner of Boone County, along Beaver Creek, to a point outside Albion. Counts began at local sunrise.
A total of 73 species were recorded during the 40-year census. This paper records those results and offers observations on patterns of occurrence or absence and changes in frequency.
A Nebraska Ornithologists' Union Occasional Paper

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