On one of these riffles Mooween stations himself during the first bright moonlight nights of June, when the run of fish is largest on account of the higher tides at the river mouth.
"Ways of Wood Folk"
William J. Long
Here and there, on small streams, are shallow riffles, where large fish are often half out of water as they struggle up.
"Ways of Wood Folk"
William J. Long
The tadpoles of P. euthysanota euthysanota were found in riffles in the streams, whereas those of P. schmidtorum schmidtorum were found in slower water, chiefly in small pools in the streams.
"A Review of the Middle American Tree Frogs of the Genus Ptychohyla"
William E. Duellman