So in June when I bought my used 08 MINI hatch non S I changed the oil , oil filter and cabin filter. When I removed the air filter there was a large grasshopper, a huge butterfly and an oak leaf stuck to the underside. I've put about 3k miles on it since then and checked under it twice. Nothing has gotten in. Looks like they get air around the driver side headlight but not enough room for these objects. Anyone know how they got there?

 

I found a small dragon fly in mine along with rocks/pebbles.