I had a quiet morning bird watching on 4th November 2022 at Ipoh, Perak. But when I came out of the forest there was a large mixed-feeding group of swifts. More than 40 birds together, comprising:
Grey-rumped Treeswifts (Hemiprocne longipennis) 15
Silver-rumped Needletail/Spinetails (Rhaphidura leucopygialis) 10
Plume-toed Swiftlets (Collocalia affinis) 10
Other unidentified Swifts 5-10
Wells (1999) notes that Grey-rumped Treeswifts foraging groups may be from 5-50 birds.
Some of the swifts, with scaly breasts, I did not initially recognise until I processed the images.
See these two birds below.
They are juvenile (possibly male) Grey-rumped Treeswifts. I have not seen juveniles in flight prior to this.
The next two images are of adults (male and female).
Wells, D.R. (1999). The birds of the Thai-Malay Peninsula: Vol. 1 (Passerines). Christopher Helm, London
Dato’ Dr Amar-Singh HSS
Ipoh, Perak, Malaysia
Note to readers: If you like this post please tap on the Like button at the left bottom of page.
Hah! What an obscene and hilarious scientific name!
Thank you for your humour. The longipennis refers to the long wing feathers which criss-cross each other at the back of the bird.