This is likewise sometimes the case with those which may strictly be said to struggle with each other for existence, as in the case of locusts and grass-feeding quadrupeds.
Horrelakoxea da batzuetan elkarren artean existentziaren alde borrokan dihardutela hertsiki esan daitekeen izakien kasua ere, otien eta lauoineko belarjaleen kasuan adibidez.