Lots of cluster flies buzzing at an attic window – close up 04.

Low resolution sample – 4K version available

Hundreds of cluster flies, also known as grass flies or attic flies, are buzzing around an attic window. This very close up shot shows them clamber over each other and fly in to the window in an attempt to escape. 4K locked tripod shot. (Ref. Insect 25)

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