If so I may know where it is
I spotted this Tussock Moth Caterpillar in one of the apple trees this morning. I probably wouldn't have noticed it had it not covered itself and the apple tree leaf with a yellow leaf from elsewhere in the garden. On initial viewing the caterpillar was in a curved shape which, shows the black segments on the back. It took some training to get it to pose for the portrait.
#1 The toothbrush.
#2 The portrait, with apologies for the OOF pebble front left, it was placed there to prevent the leaf blowing away.
#3 The curve.