Akasupe amafuta oponderezedwa okhazikika (omwe amadziwikanso kuti ma struts) nthawi zambiri amakhala zida zowonjezera, zodzipangira zokha, zomwe zimagwiritsidwa ntchito m'mafakitale osiyanasiyana kuti apereke njira yophatikizika, yamphamvu kwambiri yothandizira kukweza, kutsutsa, ndi kutsitsa ntchito. Katundu ndi Ntchito ya