Mammals in general have color vision of a limited type, and usually have red-green color blindness, with only two types of cones. Humans, some primates, and some marsupials see an extended range of colors, but only by comparison with other mammals.
snare (plural snares) 1  A trap made from a loop of wire, string, or leather. ( 2 rare) A mental or psychological trap; usually in the phrase a snare and a delusion. Shakespeare If thou retire, the Dauphin, well appointed, / Stands with the snares of war to tangle thee.
catch, capture, trap, snare, entrap, ensnare, bag mean to come to possess or control by or as if by seizing. catch implies the seizing of something in motion or in flight or in hiding. caught the dog as it ran by; capture suggests taking by overcoming resistance or difficulty. capture an enemy stronghold