=The Origin of a Curious Habit.=--The following paragraphs are taken from a recent Nature. It is well known that the kea, or mountain parrot of New Zealand, has acquired the habit of attacking sheep, and making holes by means of its sharp and powerful beak in the backs of these animals for the purpose of abstracting the kidney fat, which appears to be esteemed as a luxurious diet. It is supposed that this peculiar habit or instinct was developed by the bird getting the fat from the skins of sheep that had been slaughtered, but this solution is not very satisfactory, as there appears nothing to connect the fat on the skins of sheep with the live animals. In a note published in the Zoölogist (May 16th), Mr. F. R. Godfrey, writing from Melbourne, offers the following solution of the mystery, which seemed to him to be simple and satisfactory, and more rational than the sheepskin theory: In the hilly districts of the middle island of New Zealand there is a great abundance of a white moss, or lichen, which exactly resembles a lump of white wool, at the roots of which are found small white fatty substances, supposed by some to be the seeds of the plant, and by others to be a grub or maggot which infests it, which is the favorite food of the kea. Probably the bird, misled by this resemblance, commenced an exploration in sheep, and this proving satisfactory, originated the new habit. In a note to this suggestion the editor points out that Mr. Godfrey is in agreement with another observer--Mr. F. R. Chapman--who in describing the hills of this island says: "A very interesting _raoulia_, or vegetable sheep, was very plentiful on steep, rocky places.... It is said that the keas tear them up with their powerful beaks, and that these birds learned to eat mutton through mistaking dead sheep for masses of _raoulia_."