When they couch in their dens - For the purpose of springing upon their prey.
And abide in the covert to lie in wait? - The usual posture of the lion when he seeks his prey. He places himself in some unobserved position in a dense thicket, or crouches upon the ground so as not to be seen, and then springs suddenly upon his victim. The common method of the lion in taking his prey is to spring or throw himself upon it from the place of his ambush, with one vast bound and to inflict the mortal blow with one stroke of his paw. If he misses his aim, however, he seldom attempts another spring at the same object, but deliberately returns to the thicket in which he lay in concealment. See the habits of the lion illustrated in the Edinburgh Encyclopedia, “Mazology.”