Mr. Oldham describes the flight of the Whiskered Bat as "slow, steady, and silent--I have never heard this species squeak on the wing. Individuals did not appear to wander far, but confined their attentions to single pools or short stretches of the stream, where they flitted about the alder-bushes or threaded their way with marvellous precision through the lower branches of the sycamore trees. I never saw one rise to a greater height than twenty feet, and often they flew within a few inches of the ground or skimmed the surface of a pool for a yard or two, only to rise again to resume their flight around the alders." It is not very particular where it takes its daytime sleep. Any sort of shelter will do, whether it be a hollow tree or under a piece of loose bark, a hole in the wall, a roof, or behind window shutters. Its hibernation is passed by preference in a cave, whence it emerges for a flight whenever the weather is fine. In spite of its customary silence, it can produce a feeble squeak. On the wing it is not easily distinguished from the Pipistrelle, which is so similar in size; but the noisiness of the Pipistrelle compared with the silence of the Whiskered Bat is the best guide. The solitary young one is born in June or July. It is widely distributed throughout England, with the exception of East Anglia. In Yorkshire it has been found at an elevation of 1400 feet. It appears to be common in Wales and Ireland, but rare in Scotland. It occurs all over Europe where there are trees, and extends eastwards to Asia. It is the smallest member of its genus. [Illustration: _Pl. 22._ _D 38._ *Daubenton's Bat.* Typical alder-sheltered resort of this species.] [Illustration: _Pl. 23._ _D 39._ *Common Bat.* Vespertilio pipistrellus.] We have three other representatives of the genus _Myotis_, which is probably the largest as it is the most widely distributed of all the genera of Bats. They are all of slender, delicate form, which is seen most clearly in the shape of the skull, the muzzle, the ear and its tragus. They agree also in having thirty-eight teeth--six more than in the Horse-shoe Bat. The dental formula of all the members of the genus is: _i 2/3, c 1/1, p 3/3, m 3/3 = 38_. *Red-grey Bat* (_Myotis nattereri_, Kuhl). The Red-grey or Natterer's Bat is somewhat larger than the Whiskered Bat, the head and body measuring about an inch and three-quarters, but the tail is relatively shorter, being only an inch and a half. It has the longest wings of our species of _Myotis_, their expanse being equal to eleven inches and a quarter.