The most spectacular caterpillar I've ever seen in the flesh was a Pale Tussock Moth larvae (@ flickr) but I didn't have my camera. I did have my camera for the following four encounters, although three of them were moving fast enough to be difficult to cap. Ironically, it was the moth imago with wings that was still.
1 Caterpillar, Scarlet Tiger Moth, Callimorpha dominula, Worcestershire 04-11

2 Caterpillar, Peacock Butterfly, Inachis io, Herefordshire 06-11

3 Caterpillar, White Ermine Moth, Spilosoma lubricipeda, Worcestershire 08-11

4 Angle Shades Moth, Phlogophora meticulosa, Worcestershire 09-12

1 Caterpillar, Scarlet Tiger Moth, Callimorpha dominula, Worcestershire 04-11

2 Caterpillar, Peacock Butterfly, Inachis io, Herefordshire 06-11

3 Caterpillar, White Ermine Moth, Spilosoma lubricipeda, Worcestershire 08-11

4 Angle Shades Moth, Phlogophora meticulosa, Worcestershire 09-12
