THE NOCTULE, OR GREAT BAT 
level, and feed at a height of from fifteen to thirty or forty feet above the 
fields, pools, and open places in the woods. The crunching of their jaws 
as they masticate their insect prey may then be heard distinctly." 
Wolley describes the cry of the Noctule as a " cricket-like chirp." 
LEISLER'S BAT. 
Vesperugo Leisleri, Keyserling and Blasius. 
Plate 4. 
This species, called by Bell the Hairy-armed Bat, on account of the band 
of hair extending below the forearm on the under surface of the wing, is 
intermediate in size between the Pipistrelle and Noctule, and measures about 
12 inches in expanse of wings. 
In general, the form and character of Leisler's Bat resembles the Noctule's, 
though less lusty and robust. The feet and legs are comparatively smaller 
and more slender, and the calcarial lobe also not so large. The teeth are 
thirty-four in number. 
On the upper parts the colour of the fur is a deep brown, the lower 
greyish brown. 
Mr. A. Whitaker, who has had exceptionally good opportunities of study- 
ing this species alive, thus describes it in Wild Life (February 19 14, 
p. 79). " To my mind, however, the most satisfactory means of distinguishing 
between these two Bats is afforded by the fur of the Noctule becoming 
uniformly paler towards the base, while in the species we are considering 
the reverse is the case, the hairs, especially those of the underparts, 
being almost black at the roots. By rubbing up the fiir of the under- 
parts the wrong way, this distinction is made apparent even in a casual 
inspection." 
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