"Thestral" Migration

This picture was taken in London today. The odd smudges in the sky were explained by the Ministry to be "Thestrals migrating south for the winter" and that they "appear on film as wonky smudges". However, our very reliable sources say that they are in fact Crumple-Horned Snorkaks. We have no idea what they were doing in London as of yet, but we'll find out. The Snorkaks appear as blurs because they are not entirely visible on film.