Publication Type: | Journal Article |
Year of Publication: | 1983 |
Authors: | Alvarez, SJPeris |
Journal: | Journal of Ornithology |
Volume: | 124 |
Issue: | 1 |
Date Published: | 1983 |
ISBN Number: | 2193-7192 |
Keywords: | Sturnidae, Sturnus, Sturnus unicolor, Sturnus vulgaris |
Abstract: | Summary Tarsal coloration in Sturnus unicolor becomes progressively lighter with age and is of certain value in ageing adult birds (3Y–4Y). The process of cranial pneumatization lasts about six months from July to December for first clutch birds and from August to January for those of second broads. According to the degree of frontal pneumatization, October and November are the most effective months for the discrimination between adult and juvenile individuals. |
URL: | http://dx.doi.org/10.1007/BF01650663 |
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