Dawn chorus (birds)

[4] Moller used a play-back technique to investigate the effects of singing by the black wheatear (Oenanthe leucura) on the behaviour of both conspecifics and heterospecifics.

Moller suggested the dawn (and dusk) chorus of bird song may be augmented by social facilitation due to the singing of conspecifics as well as heterospecifics.

[5] An annual International Dawn Chorus Day is held on the first Sunday in May[6] when the public are encouraged to rise early to listen to bird song at organised events.

The dawn chorus is no longer as loud as it once was, owing to extensive loss of forests, the introduction of bird predators and competing species such as wasps.

[citation needed] The bellbird and the tūī are two of the birds that would have formed part of the dawn chorus since they have a vocal and melodious call.