Weightlifting Wasp

A female solitary wasp (Ammophila sabulosa) carrying a pebble the size of her abdomen in her jaws to seal up her nest. This large pebble was followed by several smaller ones and then sand was brushed over until the burrow was invisible. I didn't see her provisioning the nest but presumably it contains at least one paralysed caterpillar.

 

Photographed at RSPB Arne in the middle of one of the main pathways!

Done