House Swift – calls

posted in: Vocalisation | 0

“I was able to observe and record some of the calls of House Swifts (Apus affinis subfurcatus). These are extremely sociable birds and often in large flocks. This was a small flock of 15-18 birds that was fortunately low enough … Continued

House Swift mating in flight

posted in: Swifts-Swallows | 1

“I have always seen House Swift (Apus affinis subfurcatus) rushing through the air in the early morning as a group of 20-50, “screaming” away (a chorus of high pitched twittering). “I had assumed this was a feeding behaviour but while … Continued