| Avtor/Urednik | Vrezec, Al | |
| Naslov | Melanism and plumage variation in macroura Ural Owl | |
| Tip | članek | |
| Vir | Dutch birding | |
| Vol. in št. | Letnik 31, št. 3 | |
| Leto izdaje | 2009 | |
| Obseg | str. 159-70 | |
| Jezik | eng | |
| Deskriptorji | BIRDS ECOSYSTEM POPULATION DENSITY FEATHERS COLOR EUROPE |