Contains all monsters with the following ASCII glyphs:
a (insects)
b (bat, butterflies)
h (hounds)
j (slugs)
k (bees)
l (lizards) but not drakes (also l)
r (rodents)
s (spiders, scorpion)
w (worms)
y (flying insects)
B (beetles) but not program bug
F (frogs)
Q (queen insects)
S (snakes)
U (bears)
Y (yaks, sheep)
; (fish) and jellyfish (J)

See mon-data.h.