From Opus

Adult in breeding plumage
Photo by Dwaalgast
Location: Pebbles Island, Falkland Islands.

Rollandia rolland

[edit] Identification

Sometimes called Golden Grebe

L. 28-36 cm

• Medium-sized
• Prominent crest on rear crown

[edit] Adult Breeding

• Blackish-brown above
• Glossed green
• Rufous rump
• Chestnut below
• Flanks mottled blackish
• White below
• Black head and neck
• Narrow white line over eye broadening to white fan behind eye
• Red eye
• Black bill and legs

Non breeding plumaged bird (click on image for larger version)
Photo by Sylvester_b
Location: Torres del Paine, Chile.

[edit] Adult Non-breeding

• Blackish-brown upperparts and crest
• Browner, tinged reddish, neck and breast
• Whitish throat and underparts
• Lacks crest

[edit] Juvenile

Similar to non-breeding adult but bill browner and has stripes across cheeks.

[edit] Flight

Shows broad white bar on trailing edge of secondaries.

[edit] Distribution

South America from Peru, Bolivia, and southern Brazil south to Tierra del Fuego, also breeds on the Falkland Islands.

[edit] Taxonomy

Juvenile bird (click on image for larger version)
Photo by njlarsen
Location: Laguna El Peral, Chile, December 2009

Three subspecies are recognised, differing mainly in size. Nominate race, rolland (largest and darkest) is found on the Falkland Islands, chilensis (smallest) from 10 dg S in Peru south to Tierra del Fuego and from southern Brazil and Paraguay southwards, and morrisoni (intermediate) in the highlands of Peru and Bolivia.

[edit] Habitat

Upland and lowland ponds and rivers, sometimes on estuarine waters and sheltered bays in non-breeding season.

[edit] Behaviour

[edit] Breeding

Mid-October to January in Falkland Islands. Nest is a heap of floating vegetation in rushes or under a streamside overhang. Eggs: 1-3, whitish initially soon becoming stained.

[edit] Diet

Small fish, crustaceans and aquatic plants taken in 15-20 second dives.

[edit] Voice

Creaking and jarring calls when breeding.

[edit] References

1. Clements, James F. 2007. The Clements Checklist of Birds of the World. 6th ed., with updates to October 2007. Ithaca: Cornell University Press. ISBN 9780801445019
2. Erize et al. 2006 Birds of South America, non-passerines. Princeton Illustrated Checklists, Princeton, New Jersey, USA. ISBN 0-691-12688-7

• List of references

[edit] External Links