Using a powerful microscope, conservators discovered the head and a hind leg of a grasshopper entombed in the paint of the foreground, just to the right of the centre. It is hardly visible to the naked eye. https://www.theartnewspaper.com/blog/a-grasshopper-gets-stuck-in-van-gogh-s-paint-on-a-summer-s-day-in-provence
@estherschindler my paintings all contain cat hair 🤷♂️