El Hornero
Vol. 11 No. 4 (1975)

Short Communications Published 01 May 1975 https://doi.org/10.56178/eh.v11i4.1264

Notes on Anseriformes

Anseriformes Chloëphaga rubidicepsChauna torquataSouthern screamerRuddy-headed Goose
Mauricio A. E. Rumboll

Abstract

Alarm is felt regarding the future of the continental population of the Ruddy-headed Sheld-goose of South America, whose numbers in a recent count revealed a marked decrease. Only thirty (minimum) were seen on the breeding grounds in Tierra del Fuego. Metacarpal spurs have been found on two occasions embedded in the breast muscles of the Southern Screamer. The horny sheath of these is often loose, probably moulted regularly, and could be left in the flesh of an adversary during battles.

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References

  1. Crawshay, R. 1907. The Birds of Tierra del Fuego. Bernard Quaritch, London.
  2. Jehl, J. R. et al. 1973. Winter bird populations of Golfo San José, Argentina. Bulletin of the British Ornithologists' Club 93(2): 56–61.
  3. Scott, P. 1954. South America – 1953. Annual Report of the Wildfowl Trust 6: 54–69.
  4. Gibson, E. 1880. Ornithological notes from the neighbourhood of Cape San Antonio, Buenos Aires. Ibis 14: 153–169.
  5. Weller, M. W. 1967. Notes on some marsh birds of Cape San Antonio, Argentina. Ibis 109: 391–411.

How to cite

Mauricio A. E. Rumboll (1975). Notes on Anseriformes. El Hornero, Vol. 11 No. 4 (1975), 315-317. https://doi.org/10.56178/eh.v11i4.1264

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