Progress report on the North American Breeding Bird Survey
Acta Ornithologica
Proceedings of the fourth meeting of the International Bird Census Committee and second meeting of the European Ornithological Atlas Committee / editors, J. Pinowski and K. Williamson, held 1972, Warsaw, Poland
By: C.S. Robbins and W.T. Van Velzen
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Abstract
The Breeding Bird Survey has been monitoring bird population changes in the U.S.A. and Canada since 1966. Each cooperator makes 50 3-minute stops at 0.8-km intervals along randomly selected roadside routes in 4 to 4 1/2 hours on one morning in June of each year. Data from the 1500 to 1600 routes are entered on magnetic tape, edited for accuracy, and then used for statistical analysis of population change at four geographic levels: physiographic region; state or province; region (eastern, central and western); and the continent. Examples of use of the data are: (1) detection of year-to-year changes in continental or rcgional populations; (2) use of population indices to show long-term population changes; (3) range expansion and contraction at the state level, including some of the reasons for those changes and documenting the associated population shifts within the original range; (4) mapping distribution and relative abundance on either a state, regional or continental scale; (5) mapping changes in abundance; and(6) comparing breeding with winter distribution. Future potential uses will include estimates of total continental populations and indices of environmental quality.
Suggested Citation
Robbins, C., Van Velzen, W., 1974, Progress report on the North American Breeding Bird Survey: Acta Ornithologica, v. 14, no. 8, p. 170-191.
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | Progress report on the North American Breeding Bird Survey |
| Series title | Acta Ornithologica |
| Volume | 14 |
| Issue | 8 |
| Year Published | 1974 |
| Language | English |
| Contributing office(s) | Patuxent Wildlife Research Center |
| Description | 170-191 |
| Larger Work Type | Article |
| Larger Work Subtype | Journal Article |
| Larger Work Title | Acta Ornithologica |
| First page | 170 |
| Last page | 191 |