Mysterious Caterpillar

Mysterious Caterpillar

Observation - Mysterious Caterpillar - UK and Ireland. Description: It is a caterpillar and he has got these kind of brown spikes on him. I really want to know if he is poisonous or not and what kind of caterpillar is he? I wonder what you think?

It is a caterpillar and he has got these kind of brown spikes on him. I really want to know if he is poisonous or not and what kind of caterpillar is he? I wonder what you think?