Breeding densities and migration periods of common snipe in Colorado
The Wilson Bulletin
Financial support of this investigation was provided by the Accelerated Research Program of the U.S. Fish and Wildlife Service funded through the Colorado Division of Wildlife and Colorado Federal Aid in Wildlife Restoration Project W-88-R.
By: B. R. Johnson and R.A. Ryder
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Abstract
Breeding densities and migration periods of Common Snipe in Colorado were investigated in 1974-75. Sites studied were near Fort Collins and in North Park, both in north central Colorado; in the Yampa Valley in northwestern Colorado; and in the San Luis Valley in south central Colorado....Estimated densities of breeding snipe based on censuses conducted during May 1974 and 1975 were, by region: 1.3-1.7 snipe/ha near Fort Collins; 0.6 snipe/ha in North Park; 0.5-0.7 snipe/ha in the Yampa Valley; and 0.5 snipe/ha in the San Luis Valley. Overall mean densities were 06 and 0.7 snipe/ha in 1974 and 1975 respectively. On individual study sites, densities of snipe ranged from 0.2 to 2.1 snipe/ha. Areas with shallow, stable, discontinuous water levels, sparse, short vegetation, and soft organic soils had the highest densities.....Twenty-eight nests were located having a mean clutch size of 3.9 eggs. Estimated onset of incubation ranged from 2 May through 4 July. Most nests were initiated in May.....Spring migration extended from late March through early May. Highest densities of snipe were recorded in all regions during l&23 April. Fall migration was underway by early September and was completed by mid-October with highest densities occurring about the third week in September. High numbers of snipe noted in early August may have been early migrants or locally produced juveniles concentrating on favorable feeding areas.
Suggested Citation
Johnson, B., and Ryder, R., 1977, Breeding densities and migration periods of common snipe in Colorado: The Wilson Bulletin, v. 89, no. 1, p. 116-121.
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | Breeding densities and migration periods of common snipe in Colorado |
| Series title | The Wilson Bulletin |
| Volume | 89 |
| Issue | 1 |
| Year Published | 1977 |
| Language | English |
| Contributing office(s) | Patuxent Wildlife Research Center |
| Description | 116-121 |
| Larger Work Type | Article |
| Larger Work Subtype | Journal Article |
| Larger Work Title | Wilson Bulletin |
| First page | 116 |
| Last page | 121 |