. Bulletin. Natural history; Natural history. November, 1961 Smith: Amphibians and Reptiles of Illinois 97 crustaceans and insects probably make up the bulk of the diet. Breeding in the bullfrog occurs from late April until August. The call of the male is a deep bass, consisting of two slurred sylla- bles. The song, which has great carrying power, has been characterized as "jug-o'- rum" and "; Each female lays sev- eral thousand eggs in a huge surface mass, often a yard across. Hatching occurs in less than a week. Although tadpoles grow rap- idly, they presumably ove
. Bulletin. Natural history; Natural history. November, 1961 Smith: Amphibians and Reptiles of Illinois 97 crustaceans and insects probably make up the bulk of the diet. Breeding in the bullfrog occurs from late April until August. The call of the male is a deep bass, consisting of two slurred sylla- bles. The song, which has great carrying power, has been characterized as "jug-o'- rum" and "; Each female lays sev- eral thousand eggs in a huge surface mass, often a yard across. Hatching occurs in less than a week. Although tadpoles grow rap- idly, they presumably overwinter, develop- ing legs the following spring, and metamor- phose in July and August of their second season. The larvae may attain a length of more than 6 inches. Illinois Distribution.—The bullfrog is common in all parts of Illinois, fig. 83. Although undocumented by specimens, published records for the following locali-. Fig. 83.—Distribution of Rana catesheiana. The species occurs throughout Illinois. Solid circles indicate localities represented by speci- mens examined during this study; open circles, localities represented by published records believed to be valid. The lower map depicts the total range of the species in the United States. ties are believed valid and are indicated on the distribution map by hollow symbols: Cook County: Evanston (Schmidt & Necker 1935) ; Willow Springs (Schmidt 1929); Du Page County: Naperville (Necker 1939c); Jackson County: Car- bondale (Cagle 1942^) ; 2 mi. S Elkvllle (Burt & Burt 1929) ; Lake County: Wau- kegan (Schmidt 1929) ; McHenry Coun- ty: McHenry (Necker 1939c); Macoupin County: Standard City (Owens 1941); Madison County: opposite St. Louis (Hurter 1893); Morgan County: Mere- dosia (Weed 1923); Peoria County: Pe- oria (H. Garman 1892) ; Union County: Anna (H. Garman 1892); 7 mi. S Anna (Burt & Burt 1929); Wabash County: Mount Carmel (Yarrow 1882fl) ; Wash- ington County: 7 mi. BE Beaucoup, Nashville (Burt & B
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