are replaced by lungs. Arms, with elbows showing first, push out of the 
breathing pore. For a while the tadpoles are entirely dependent for loco¬ 
motion on their long tails which quickly grow again if an enemy, such as 
the diving beetle, performs an amputation. Later the tail gradually dis¬ 
appears to he replaced by powerful hind legs. 
The southern bull frog scarcely deserves its name, for its croak most 
closely resembles a pig’s grunt. It grows to a length of from four to five 
inches, and is colored lustrous yellow-greens and browns. Its eyes are set 
close together in its long head. It ranges from Louisiana to Florida and 
southern Georgia. 
LEOPARD FROG 
Though less publicized than the bull frog, the leopard frog is the most 
common of North American species. It owes its name to its coloring and 
markings rather than to any unusual agility or ferocity. Two bronze or 
yellow folds of skin run almost parallel from the frog’s eyes to its pos¬ 
terior; between them are rows of brown or olive-green spots, each encircled 
by a fine yellow or white line. 
Now and then the leopard frog leaves its pond for a trip overland. 
If surprised, it squirts forth a foul-smelling liquid at its assailant, and 
will stage a determined fight for freedom. When captured, however, it 
soon grows resigned and, as a rule, songful. Its rather pleasing sound is 
produced by vocal pouches, which swell up behind and under the ears. 
When collapsed, the skin of these pouches is crinkled and baggy. 
The leopard frog accomplishes its frequent skin changes with quite a 
ceremony. First the skin splits over the back of the head, and the front 
feet are used to draw it over the eyes. During this first stage the frog sits 
with its back buckled high. Once the skin is over the back, it must be kicked 
off the hind legs. This is accomplished by stretching the legs arduously 
back and forth until the skin is brushed off. 
The southern leopard frog is considered the most beautiful frog of 
America; it shows its aristocratic breeding by refusing to mate with 
the ordinary leopard frog, which often shares its habitat. Easily distin¬ 
guished from the leopard frog by its intense metallic green and brown 
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