Well, really, it's a hornet. It's a bit scary to be in the pool and have him dive bombing about while he works ...
... then eventually he settled down to the business of digging his hole to bury his spoils.
I have to tell you once he stopped flying I was hard pressed to stop watching his work. Fascinating.
The hornet to the right starting his digging.
He has a little pile of sand going now ... he digs into the hole, goes down in and then brings the sand out ...
Hole top middle with the hornet. Spoils, the poor dead cricket to the bottom left.
The lighter sand is the sand he dug out of the hole and this is just before he drags his spoils to the hole for burial.
Poor little cricket.