The instinct which in character comes nearest to that of the parent simulating the action of a wounded and terrified bird struggling to escape in order to safeguard its young, is that one, very strong in all ground-breeding species, of sitting close on the nest in the presence of danger. Here, too, the instinct is of prime importance to the species, since the bird by quitting the nest reveals its existence to the prowling, nest-seeking enemy--dog, cat, fox, stoat, rat, in England; and in the country where I first observed animals, the skunk, armadillo, opossum, snake, wild cat, and animals of the weasel family. By leaving its nest a minute or half a minute too soon the bird sacrifices the eggs or young; by staying a moment too long it is in imminent danger of being destroyed itself. How often the bird stays too long on the nest is seen in the corn-crake, a species continually decreasing in this country owing to the destruction caused by the mowing-machine. The parent birds that escape may breed again in a safer place, but in many cases the bird clings too long to its nest and is decapitated or fatally injured by the cutters. Larks, too, often perish in the same way. To go back to the ailing or wounded bird simulating action: this is perhaps most perfect in the gallinaceous birds, all ground-breeders whose nests are most diligently hunted for by all egg-eating creatures, beast or bird, and whose tender chicks are a favourite food for all rapacious animals. In the fowl, pheasants, partridges, quail, and grouse, the instinct is singularly powerful, the bird making such violent efforts to escape, with such an outcry, such beating of its wings and struggles on the ground, that no rapacious beast, however often he may have been deceived before, can fail to be carried away with the prospect of an immediate capture. The instinct and action has appeared to me more highly developed in these birds because, in the first place, the demonstrations are more violent than in other families, consequently more effective; and secondly, because the danger once over, the bird's recovery to its normal quiet, watchful state is quicker. By way of experiment, I have at various times thrown myself on pheasants, partridges and grouse, when I have found them with a family of recently-hatched chicks; then on giving up the chase and turning away from the bird its instantaneous recovery has seemed like a miracle. It was like a miracle because the creature did actually suffer from all those violent, debilitating emotions expressed in its disordered cries and action, and it is the miracle of Nature's marvellous health. If we, for example, were thrown into these violent extremes of passion, we should not escape the after-effects. Our whole system would suffer, a doctor would perhaps have to be called in and would discourse wisely on metabolism and the development of toxins in the muscles, and give us a bottle of medicine.