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.
Latin lacere to entice). Later also net, noose, snare (c.1300); piece of cord used to draw together the edges of slits or openings in an article of clothing (late 14c.). The ornamental net pattern meaning is first recorded 1550s. Sense of cord for tying remains in shoelace.