Leafcutter Bee (Megachile sp.) cutting out a leaf section. She'll use these sections to line the brood cells of the nest she's constructing, the material is less a construction tool and more of an insulator.
Its really interesting to see how carefully she rolls the segment, and secures it with all 6 legs. Note that by the end, the bee is only holding on by the mandibles, the last bite allowing her to drop off and fly away.

Photographed in Ontario, October 2020.