With cattle susceptibility to the attacks of flies is correlated with colour, as is the liability to be poisoned by certain plants; so that even colour would be thus subjected to the action of natural selection.
Ganaduari dagokionez, eulien erasoekiko duen gaitasuna kolorearekin korrelazioan dago, zenbait landarek pozoitua izateko duen arriskua ere dagoen bezala; horrela, beraz, kolorea ere hautespen naturalaren eraginaren mende egonen litzateke.