2S8 



Frogs of the Okefinokee Swamp 



croaks. When two individuals are calling together, but not in unison, there 

 is an interesting antiphonal effect, as of a double note: bo-habe, bo-babe, bo- 

 babe, etc. Probably both the calling periods and the intervals between them 

 are irregular in length. On one occasion the former appeared to last i^ min- 

 utes, and the latter about 2 minutes. When one frog pipes up, after an inter- 

 val of general silence, all the others in the vicinity generally chime in almost 

 immediately, as if having just awaited such a signal to start the chorus. 

 As a matter of fact, a spirit of competition probably enters here, each male 

 being desirous of announcing his location to any nearby female that may be 

 ready to mate. 



A resume of the croaking records for 192 1 and 1922 is: 



April 



April 

 April 

 April 

 May 



May 

 May 

 May 



May 

 May 



May 



25 



27 



30 



3 



9 

 10 

 II 



13 



14 



16. 



I92I 

 Heard one in Long Pond 7:30 p. m. Males on bonnets croaking in 

 evening in another pond. 



One heard at 10:00 a. m. Few heard in afternoon. 

 Many heard at night. 



Cold tonight. Air 58°. No Hyla cinerea calling. 

 Tonight at 8:00 the temperature is 56°F. The last few days have 

 been so cool that the Hyla cinerea beginning choruses are closed. 

 Billy's Lake, a few calling at 8:30 p. m. Temperature 73°. 

 Croaking at night the Southern bull frog pond. 

 "Wave" chorus at Billy's Lake stopped about 1 1 :oo p. m. Tempera- 

 ture fell to 71° and a cooling rain anticipated. It came. 

 Few heard in afternoon. 



In a Pontederia and Saururus pond heard tonight no end of Hyla 

 cinerea. 



At 7 :oo p. m. heard an immense and intense chorus along Billy's 

 Lake in all the ponds and bays. "We flashed a Hijla cinerea calling. 

 They are easy subjects." 

 At times plenty of Htjla cinerea calling. 

 Common at night. 



Hyla cinerea going strong at 7 :oo p. m. Air 70°. Few calling in mid 

 afternoon. 



Wonderful chorus east of Billy's Lake. Great racket in Moonshine 

 Pond 9:00 p. m. 



"Strong tonight" at 10:00 p. m. Air 77°F. No end of them calling. 

 In many ponds the dominant note. Starting up at 5 :oo p. m. 

 Going 8-11:00 p. m. and later. 



Out tonight. Heard H. cinerea calling commonly. 

 A few calling 

 One or two calling. 



Many heard in various places at night. 

 Air 71°. Many heard at Moonshine Pond. 

 A number calling about dusk. Air 70°. 



Tonight at times quite a chorus in some of the cypress ponds. 

 Air 8o°F. 



Every night for a week Hyla cinerea has been active. 

 Last night a chorus. 



Ponds alive with croaking H. cinerea after the evening's rain of 2 

 or more inches. 

 Hyla cinerea abundant. 



Strong tonight. "Today heard several and once or twice in hot day 

 H. cinerea burst into chorus. Is a storm coming?" 



