Hylidae
- Hyla
- Dryophytes
- Hyloscirtus
- Pseudacris
- European Tree Frog Hyla arborea
Photo: Codrin Bucur · (c) Codrin Bucur, some rights reserved (CC BY) · CC BY 4.0 In a survey in western Zealand Flanders, the maximum number of males calling in one night helped estimate the seasonal male population in pools.
