What sounds do frogmouths make?

Frogmouths, which belong to the order Caprimulgiformes, are known for producing various vocalizations for mating and territorial purposes. Specifically, these birds sing using a range of nasal booming, hooting, or croaking sounds.1

In addition to these vocalizations, some related species within the group, such as the little-known owlet-frogmouths, are reported to emit owl-like whistles, churring calls, and loud hissing notes. Like many other birds in their order, frogmouths rely on these distinctive vocal patterns as a primary mechanism for species recognition.1