As some rude resemblance is necessary for the first start, we can understand how it is that the larger and higher animals do not (with the exception, as far as I know, of one fish) resemble for the sake of protection special objects, but only the surface which commonly surrounds them, and this chiefly in colour.
Abiapunturako nolabaiteko handi-handikako antza behar denez gero, uler dezakegu zergatik ez duten animalia handi edo goi-mailakoek (dakidanaino, arrain mota batek ezik) gauza konkretuen antzik beren burua babesteko, normalean inguruan duten azalerarena baizik, kolorean nagusiki.