kHz
ML616282016
Contributeur
Simon Mahood Fichiers multimédias de ce contributeur Profil
Date
Site d'observation
Nyabugogo Quarry, Kigali, Kigali City, RW (-1.951, 30.027)
Ville de Kigali, Rwanda
Fichiers multimédias de cet endroit Liste illustrée- Âge
- Non précisé
- Sexe
- Non précisé
- Repasse
- Non précisé
Détails de l'observation
The main reason for the visit to the site was to try and confirm the identity of the swifts that looked like African Swift. Some better recordings were made of the flight call (attached). The sonograms of these recordings reveals an even trill at 5khz, with a higher frequency introductory note. In contrast, the flight call of African Swift should be an even trill at 6khz ending with a descending element. Michael Mills has pointed out that these recordings are Mottled Swift, which was a surprise because we've not photographed that species at the site. However, on this occasion I made no attempt to look at the swifts with binoculars, I just tried to get recordings.
Informations techniques
- Enregistreur
- Microphone
- Accessoires
- Taille originale du fichier
- 864.53 KB