It is one of the rarest of our Bats, and like the Great Bat a woodland species, making its dormitory preferably high up in a decayed oak, but also in the roofs and crevices of buildings. Its period of activity begins about the third week in April and lasts until near the end of September, when it goes into hibernation, but a little mild weather in winter will wake it up and bring it out for a flight. According to the observations of Mr. C. B. Moffat it flies for about a hundred minutes just after sunset, and for a similar period just before sunrise. Its food consists of flies, beetles, and moths. Dr. Alcock, who has brought this Bat down by shooting it an hour after sunset, found it so crammed with food that it did not appear physically possible for it to feed longer. [Illustration: _Pl. 30._ _D 48._ *Leisler's Bat.* Asleep on roof masonry.] [Illustration: _Pl. 31._ *Long-eared Bat.* Plecotus auritus.] [Illustration: _Pl. 32._ *Long-eared Bat.* Ears uncurling after sleep.] [Illustration: _Pl. 33A._ _E 49._ Face, showing distinctive ear and tragus. *Barbastelle* (_Barbastella barbastellus_).] [Illustration: _Pl. 33B._ _E 49._ On the wing (reduced two-thirds). *Barbastelle* (_Barbastella barbastellus_).] The distribution of Leisler's Bat does not agree at all with that of its near ally, the Great Bat. It has been obtained chiefly in the Valley of the Avon (Warwickshire); also in Yorkshire, Cheshire, and Norfolk. It does not appear to occur in Scotland; but it is reported as abundant in several parts of Ireland. It is a purely European species, occurring only from Central Europe westward. *Long-eared Bat* (_Plecotus auritus_, Linn.) The Long-eared is probably the best known of our Bats owing to the very distinctive character afforded by the huge ears, which are as long as the forearm and longer than the body. In addition, it is one of the commonest and most widely distributed of our Bats, and likely to be met with anywhere in the British Islands. It is, however, rarer in the North of Scotland than elsewhere. It is found nearly all over Europe.