| Titre : | Tree sparrows (Passer montanus) remove eggs from their own nests. |
| Auteurs : | Stefan Floerchinger, Auteur |
| Type de document : | Article |
| Dans : | Vogelwarte (41(4) Dezember 2002) |
| Article en page(s) : | 279-282 |
| Langues: | Allemand |
| Résumé : | A breeding pair of Tree sparrows was observed by a video camera in its nestbox. A single young hatched from a clutch of six eggs. To remove the unhatched eggs with its bill an adult picked a hole into the egg-shell first. Since eggs with small holes can sometimes be found near nestboxes, this could indicate typical nest-cleaning behaviour before a subsequent breeding attempt. |



