To the right species of bee, this looks like another very aggressive bee, and it goes and bonks it on the head lots and lots of times to try and drive it away, and, of course, covers itself with pollen.
Para a espécie certa de abelha, isto assemelha-se a outra abelha muito agressiva. A abelha bate-lhe na cabeça várias vezes, para a tentar afastar,