Feeding flights of breeding double-crested cormorants at two Wisconsin colonies
Journal of Field Ornithology
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Abstract
Unmarked Double-crested Cormorants (Phalacrocorax auritus) (n = 523) were followed by airplane from Cat Island and Spider Island, two nesting colonies in Wisconsin, to their first landing site. Cormorants flew an average of 2.0 km from Cat Island (maximum 40 km) and 2.4 km from Spider Island (maximum12 km). The mean direction of landing sites differed seasonally for fights from Spider Island, but not from Cat Island. Cormorants generally landed in Green Bay or Lake Michigan (>99%) and rarely landed in inland lakes or ponds. The most frequent (> 80%) water depth at landing sites for each colony was < 9,1 m. Water depths >9.l m were used less frequently than available within the maximum observed flight distance for each colony. The average flight speed for cormorants was 61 km/h.
Suggested Citation
Custer, T., Bunck, C., 1992, Feeding flights of breeding double-crested cormorants at two Wisconsin colonies: Journal of Field Ornithology, v. 63, no. 2, p. 203-211.
Study Area
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | Feeding flights of breeding double-crested cormorants at two Wisconsin colonies |
| Series title | Journal of Field Ornithology |
| Volume | 63 |
| Issue | 2 |
| Year Published | 1992 |
| Language | English |
| Publisher | Wiley |
| Contributing office(s) | Patuxent Wildlife Research Center |
| Description | 9 p. |
| First page | 203 |
| Last page | 211 |
| Country | United States |
| State | Wisconsin |
| County | Door |
| Other Geospatial | Spider Island |