Around 30 Swifts overhead early evening went very high in a tight bunch so I guess they had found a swarm of insects similar to around 60 B H Gulls and a few Common Gulls had done late afternoon over the park. Steve L also had a good number of gulls over Elland early afternoon in the same manner and they were probably feeding on flying ants which seem to have come out in numbers in the last day or two.
Also tonight a Peregrine overhead looked to be heading towards Dean Clough chimey or one of the tall town centre buildings to roost (?)
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Yes, the ants were flying today at 2 different places near Skircoat.
I seem to remember some entomologist on the Today programme on Radio 4 asking a bit back for data on this phenomenon.
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