Record fledging count from a seven-egg clutch in the Cooper’s Hawk (Accipiter cooperii)
Wilson Journal of Ornithology
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Abstract
Cooper's Hawks (Accipiter cooperii) typically lay 3–5 eggs per clutch, rarely 6 eggs, and there are 2 accounts of 7-egg clutches and 1 record of a maximum 8-egg clutch for the species. Brood sizes of 3–5 young are common and the previous maximum brood count is 6 young. However, in 2019, we found an urban nest in Stevens Point, Wisconsin, with 7 eggs that resulted in a record high of 7 fledglings. We genetically confirmed that the attending male sired all the offspring and the attending female laid all 7 eggs. Larger body size of the tending adults may have been a factor in the exceptional reproduction reported here.
Study Area
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | Record fledging count from a seven-egg clutch in the Cooper’s Hawk (Accipiter cooperii) |
| Series title | Wilson Journal of Ornithology |
| DOI | 10.1676/1559-4491-132.2.460 |
| Volume | 132 |
| Issue | 2 |
| Year Published | 2021 |
| Language | English |
| Publisher | Allen Press |
| Contributing office(s) | Alaska Science Center Biology WTEB |
| Description | 4 p. |
| First page | 460 |
| Last page | 463 |
| Country | United States |
| State | Wisconsin |
| City | Stevens Point |
| Google Analytic Metrics | Metrics page |