| Publication Type: | Journal Article |
| Year of Publication: | 2011 |
| Authors: | WALKER, MARKD, ROTHERHAM, IAND |
| Journal: | Bird Study |
| Volume: | 58 |
| Date Published: | 2011 |
| ISBN Number: | 0006-3657 |
| Keywords: | Apodidae, Apus, Apus apus, Micropus, Micropus apus |
| URL: | http://www.tandfonline.com/doi/abs/10.1080/00063657.2010.546391 |
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