The animation shows a fly laying eggs on an ant, and the finished development of the fly drilling out of the ant's head looks very scary.
The world's smallest fly, only 0.4mm long, is 15 times smaller than the average fly and much smaller than our common fruit fly, so much so that it can parasitize the head of an ant.
Adults lay eggs on ants, and larvae mature on the head of the ant, and when they become adults, the flies decapitate the ants from the inside and then drill out of the ant's head, which looks like a bridge section of a horror movie, but does appear in the real insect world.
Although ants are small, there are insects that live in the body of ants, which has to make people marvel at the magic of nature.