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.
A snare is a series of wires or cables that run across the diameter of the bottom head. In addition to snares, every snare drum has a mechanism or switch to put tension on the snares so that they rub up against the bottom head. This mechanism is called the throw-off or strainer..