 Its flask-shaped nest has a long entrance tube angled downward and is lined with fine grasses.It is constructed 1–2.5 m high in a fork of a thorny tree or shrub, often close to a wasp nest.The female alone incubates the three or four unspotted white or pale greenish-blue eggs for about two weeks to hatching, and the young fledge in about the same length of time again.