| Titre : | British Birds 114(10) - October, 2021 |
| Type de document : | Bulletin |
| Paru le : | 01/10/2021 |
Dépouillements
Article
Hein van Grouw, Auteur ;
Dirk Tolkmitt, Auteur ;
Detlef Becker, Auteur ;
Frank Weihe, Auteur
Scattered records of birds with an unusual brown colour to parts of their plumage have been known for some time but, so far, the nature of this aberration has not been investigated. Aberrant reddish-brown phaeomelanin has been recorded in many s[...]
Article
Mark J. Eddowes, Auteur ;
Alison J. Lea, Auteur
The 'wing-clapping' noise given by displaying male European Nightjars Caprimulgus europaeus is generally considered to be generated by the primary tips being struck together in flight. However, observations and audio recordings suggest this migh[...]
