• Summary
• Text account
• Data table and detailed info
• Distribution map
• Reference and further resources

Justification of Red List category
This species is classified as Near Threatened because it has a moderately small population.

Population justification
The population size is preliminarily estimated to fall into the band 1,000-2,499 mature individuals. This equates to 1,500-3,749 individuals in total, rounded here to 1,500-4,000 individuals.

Trend justification
A survey in 2006 found that the breeding population had not increased but was stable at around 500 pairs.

Phalcoboenus australis is restricted to isolated shores, rookeries and islets off extreme south Argentina and Chile, including the south and east coasts of Isla Grande on Tierra del Fuego, Isla de los Estados, Navarino and Cape Horn, and the Falkland Islands (Malvinas) (Bierregaard 1994, Strange 1996). It is rare in much of its range (Bierregaard 1994), but locally numerous on some of the smaller islands in the west Falklands (Strange 1996, Woods and Woods 1997). In 1983-1992, the population on the Falklands was estimated at 500-900 breeding pairs, with more recent surveys suggesting 500-650 pairs (R. Woods in litt. 1998). A 2006 survey found that the breeding population had not increased despite the species being protected by law since 1999 but was stable at around 500 pairs (R. Woods 2006).

It occurs in open lowlands, from the tidal zone perhaps to low coastal mountains, and most typically along rocky coasts (Bierregaard 1994), feeding on dead adults and chicks of colonial seabirds, and insects and grubs along the tidal zone (Bierregaard 1994). It will attack weak or stranded sheep and, in groups, wild geese (Canevari et al. 1991).

It was heavily persecuted in the past on the Falklands (Bierregaard 1994), and is much reduced in numbers (Woods 1988). The immature population is probably only capable of replacing losses in the breeding population (Strange 1996), but none of the populations seem to be facing any major threats.

Conservation Actions Underway
CITES Appendix II. It is officially protected by Falklands Islands (Malvinas) law.

Conservation Actions Proposed
Monitor breeding population on at least one island (including ringing to monitor juvenile mortality rate) (R. Woods 2006). Study ecology, dispersal, population dynamics and survival (R. Woods 2006). Assess incidence of damage to livestock and evaluate impact of species on sheep farming, then begin dialogue with farmers (R. Woods 2006).

Text account compilers
Benstead, P., Capper, D., Mansur, E., Sharpe, C J, Symes, A.

Contributors
Woods, R.W.

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Recommended citation
BirdLife International (2024) Species factsheet: Striated Caracara Phalcoboenus australis. Downloaded from https://datazone.birdlife.org/species/factsheet/striated-caracara-phalcoboenus-australis on 25/12/2024.
Recommended citation for factsheets for more than one species: BirdLife International (2024) IUCN Red List for birds. Downloaded from https://datazone.birdlife.org/species/search on 25/12/2024.