Namibia, Caprivi strip, big flock, alpine swift ? (1 Viewer)

[djolof]

Hello,
I have seen this big flock in Mahango reserve at the Caprivi strip in Namibia, 2024 February 27.
I'm thinking of alpine swift but there is a white patch on the back near the end of the tail (image 2) and I thought there were none on this specie.
The birds have been landing on a piece of land in the middle of a seasonal pond, staying and taking off later.
I thought that swifts were not easy on land for take off, but for these one, taking off was very fast.
So I have a big doubt on my guess for alpine swift
Thanks if someone can help ...

 

[Butty]

Pratincoles - they fly more like terns than swifts. In pic 1, they all look like collared pratincoles

 

[Southern Viking]

Yeah the combination of white trailing edge to secondaries and chestnut panels on underwings show them to be Collared Pratincoles as Butty says

 

[djolof]

Thank you Butty and Southern.
Now that I have your ID, I see that I should have found it in my bird book.
Incomplete reading of the drawings
Well, learning everyday

 

[Merlin]

djolof

I saw several hundred pratincoles on the Chobe river where it's Namibia one side and Botswana the other .

regards
Merlin

 

[djolof]

Thanks for the info.
So it was almost the same area