https://coxsignal.com/index.ph....p/a-planned-out-asse
Hyla versicolor tadpoles change from single bubble-sucking to double bubble-sucking at about 5.7 mm snout-vent length (SVL), which corresponds to a period of rapid lung maturation if they transition from low to high vascularization (6.0 mm SVL). Practical, behavioral and morphological evidence shows that two fold bubble-sucking increases the effectiveness of pulmonary fuel change by isolating expired, deoxygenated air from newly empowered air to avoid mixing. Hyla versicolor, and