| Publication Type: | Journal Article |
| Year of Publication: | 1987 |
| Authors: | Klaassen, M, Slagsvold, G, Bech, C |
| Journal: | The Auk |
| Volume: | 104 |
| Issue: | 4 |
| Date Published: | 1987 |
| ISBN Number: | 00048038 |
| Keywords: | Falconidae, Microhierax, Microhierax fringillarius, Rissa, Rissa tridactyla |
| URL: | http://www.jstor.org/stable/4087297 |
| Short Title: | The Auk |