We have had the pleasure of watching avian feeding frenzies in our Avocet back garden in the last few days. Firstly we watched flocks of noisy crows wildly feeding on flying ants on the hillside behind us. Through our scope we could see their wildness and greed as the ants in the big patch of sloping dry ground took to the air. It seems little gain for such large birds, but perhaps ants provide some essential nourishment. Or some drug!
The ants nesting alongside our garage wall took flight the following day and were instantly gorged upon by robins and blackbirds. How do birds know this is about to happen?
The food source of the third instance was a complete mystery. Early one sunny evening the garden was invaded by dozens of swallows swooping low through the trees and borders, occasionally landing on the roofs of the conservatory and garage. This continued for a good hour with the garden seeming at times absolutely full of swallows performing amazing aerial acrobatics. What entertainment! They put the Red Arrows to shame.