Where Do Bitterns Nest?

Nest: Site is usually in dense marsh growth above shallow water, sometimes on dry ground among dense grasses. Nest (apparently built by female alone) is a platform of grasses, reeds, cattails, lined with fine grasses.

Do bitterns nest in trees?

They nest in freshwater and brackish marshes with tall aquatic vegetation such as cattails and other reeds and rushes, preferentially in places interspersed with patches of open water and small stands of woody vegetation.

What time of day do bitterns boom?

Australasian Bitterns are more active in September and show a peak in calling rate just before sunrise. Figure 1 Australasian Bitterns show a peak in calling rate about one hour before sunrise.