| Titre : | Population development of Firecrest (Regulus ignicapillus) and Goldcrest (Regulus regulus) in the Harz mountains. |
| Auteurs : | Klaus George, Auteur |
| Type de document : | Article |
| Dans : | Vogelwarte (41(4) Dezember 2002) |
| Article en page(s) : | 284-287 |
| Langues: | Allemand |
| Résumé : | In a study area of 49.3 ha in the Harz Mountains (Sachsen-Anhalt) Firecrests significantly increased between 1993 and 2002 whereas the breeding stock of Goldcrests showed considerable fluctuations during the same period, and an intense population crash in 2002. This is possibly due to changes in the availability of specific food resources used by Goldcrests. A female Goldcrest was controlled for three breeding seasons. |



