c.1300, to call, call out; to ask or demand by virtue of right or authority, from accented stem of Old French clamer to call, name, describe; claim; complain; declare, from Latin clamare to cry out, shout, proclaim, from PIE *kele-(2) to shout, imitative (cf. Sanskrit usakala cock, literally dawn-calling; Latin calare to announce solemnly, call out; Middle Irish cailech cock; Greek kalein to call, kelados noise, kledon report, fame; Old High German halan to call; Old ...
Most black panthers hunt at night. They are masters of concealment and use every available rock, bush, or depression to hide themselves and get as close as possible to their prey. As they wait, they are silent and cautious.
Although most species sleep at night (because hunting for food isn't that easy, especially if you're hunting for insects), many can find their way around in the dark. We know this because many species of birds migrate only at night (they use, among other cues, the stars to migrate, so they do need some points of light).