WOODRUFF: As the bullfrog population went down, you started to hear some of our native chorus frogs again. DANIEL: In other words, once the bullfrogs croak, the native frogs can finally croon.

MR. S. W. FROST had a bullfrog of 200 gm. under observation in a cage provided with a small pond (“The Food ofRana catesbeiana, Shaw”, Copeia, No. 1; 1935). Its feeding capacity is amazing.

Get to know the American bullfrog, the giant amphibian with the bull-like bellow, and one of North America’s most widespread frog species.

THE comparative aspects of the mechanism of oxygenations dependent on molecular oxygen have recently been investigated using the biosynthesis of trimethylamine-N-oxide as a model1. That ...