Crested pigeon

 By – Vinuri Randhula Silva,

The crested pigeon (Ocyphaps lophotes) is a bird found widely throughout mainland Australia except for the far northern tropical areas. Only two Australian pigeon species possess an erect crest, the crested pigeon and the spinifex pigeon. The crested pigeon is the larger of the two species. The crested pigeon is sometimes referred to as a topknot pigeon, a common name shared with the reddish crested Lopholaimus antarcticus of Eastern Australia.

The length of the crested pigeon varies from 30 to 34 cm (12 to 13.6 in). Colouration is grey with tinges of brown and green. It has a feathered but slender, black spike on top of the head. It runs with the crest erect. The periorbital skin is bright orange. Wings have black stripes and are bronzed, while the primary feathers have colorful areas of brown, purple, blue, and green. Immature birds have duller colors with no bronzing on the wings. The birds can be normally seen in two sizes, they can be thin or plumped. It is almost impossible to tell if a crested pigeon is male or female, because they have the same plumage.

If startled, the crested pigeon takes to the air with a distinctive whistling 'call', the source of the noise can be attributed to the way the air rushes over a modified primary feather found on the wings.

Their most distinctive behaviour is the beating and whistling sound their wings make when they take off. This is most likely to draw the attention of predators to birds on the wing, and away from any birds remaining on the ground, and as an alarm call to other pigeons. When the birds land, their tails tilt upwards and the flight patterns are similar to those of the spotted turtle dove. They can be highly social and tend to be seen in flocks of varying sizes. They are highly gregarious birds when in contact with humans.

While they breed throughout the year, it is more common in the warmer months. Males approach females and begin an elaborate mating dance; they bob their bodies up and down, while opening and closing their wings like a fan with each bob. This is accompanied by a soft hooting which is timed with the bobbing. If the female is interested, she remains generally stationary as the male approaches, until copulation is attempted. Nesting usually occurs in shrubs or trees. Nests usually consist of a platform of twigs. They lay two oval, white, glossy eggs. The eggs usually hatch 3 weeks after they were laid. Both parents incubate the eggs.

 

References

1) BirdLife International (2016). "Ocyphaps lophotes". IUCN Red List of Threatened Species. 2016:

 2) Black, A. (2015). "Range expansion of the Crested Pigeon, Ocyphaps lophotes, in South Australia". South Australian Ornithologist. 40 (2): 45–61.

3) Gill, Victoria (2 September 2009). "Pigeons' wings sound the alarm". BBC News.     Retrieved 2009-09-02.