Self-abnegation is perhaps one of the most beautiful characteristics which parental love can give. This is particularly shown when the young are in danger. A human mother in charge of her child will defy a danger before which she would shrink if alone, and in its defence would dare deeds of which most strong men would be incapable, for during the time her selfhood is extinguished, and her being is sunk into that of her child. Such abnegation becomes a true mother, for if she would not consent to do and dare for the sake of her offspring, she would degrade herself below the beasts and the birds, who hesitate not in performing that duty to their children, though _savants_ do declare that they possess only storgë, whatever they may mean by it, and not parental love. [Illustration: EVIDENCE OF CONJUGAL AFFECTION. Male Humming-Bird Feeding His Partner, and Ready to Act in Her Defence.] Everyone who has paid even a passing attention to the habits of birds must have noticed the vigilance a pair of catbirds exercise over their nest when containing young birds. Neither parent, when the other is absent, relaxes this vigilance, for they consider no labor, no care, no watchfulness, too great or too exacting where their offspring are to be benefited. Let an enemy approach, even if it be man himself, and they are beside themselves with anger and resentment, flying into the very face of the audacious intruder, as though they would pluck his eyes out as a just punishment for his presumption and temerity. I have seen the nest of a catbird attacked by a black snake, and crushed within the folds of the hideous serpent the father-bird, but the disaster did not cause the mother-bird to desist from the attack, for, utterly oblivious of all else but her offspring and the snake, she fought on until the latter was forced to glide away into the bushes to escape her infuriated assaults. But no species of bird is more courageous in defence of its nest than the little ruby-throated humming-bird. It is really dangerous to visit the nest when with eggs or young. I would as soon attempt to assail the dome-shaped nest of our common hornet as that of this humming-bird. It is as much as one can do to protect his eyes from the lightning-like attacks of these birds, so swiftly and so unerringly do they direct their blows at these points.