Archived 2011-2012 topics: Baird’s Trogon (Trogon bairdii): request for information

This discussion was first published on Dec 1 2010 as part of the 2010-2011 Red List update.

Initial deadline for comments: 31 January 2012.

Link to BirdLife species factsheet for Baird’s Trogon

Baird’s Trogon Trogon bairdii is listed as Near Threatened under criterion B1a+b(i,ii,iii,v) because, although its Extent of Occurrence is less than 20,000 km2 and deforestation is suspected to be causing an ongoing population decline, its population is not considered to be severely fragmented or restricted to a few locations.

Up-to-date information is requested to assist in the assessment of this species’s threat status, particularly the level of habitat fragmentation within its range, including the percentage of suitable habitat that exists in patches too small to support viable populations.

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One Response to Archived 2011-2012 topics: Baird’s Trogon (Trogon bairdii): request for information

  1. Baird’s Trogon is distributed from sea level to 1600 masl in the central and southern Pacific Slope of Costa Rica, especifically from Río Tárcoles south to the Costa Rica-Panamá border. It occurs in humid tropical forests, mainly in primary forest, although is also found in tall secondary forest, forest patches of middle sizes, sometimes visiting forest edges. Its core populations are found in Corcovado, Peñas Blancas, Manuel Antonio and Carara National Parks, as well as the lowlands of La Amistad International Park. Outside these areas the populations, are small, inhabiting mostly in private reserves. Most of these populations are isolated from each other by habitat fragmentation, due to forest clearing in the past (agriculture and cattle raising) and more recently by increased coastal development and extensive oil palm and pineapple plantations.
    The attractive views and ocean side location of much of its range has increased land prices to the sky, making it virtually inaccessible to any conservation attempt. No less than 60% of the original range has suffered land use change, reducing and segregating the species populations into smaller and less valuable patches, in the last 60 years. Also the actual destruction of the Fila Costeña forests is generating the isolation of the lowland and highland populations.
    Although we have not detected any population change in the last 3 years, and despite some large protected areas should posses healthy populations, the ongoing fragmentation and habitat destruction are probably affecting this species. Given the small population size (450-1,800 mature individuals, BirdLife International 2011), its small distribution, the ongoing fragmentation of its habitat, we infer that the population size could decrease in the next years. Hence, we consider that the species should be uplisted to Vulnerable.

    Unión de Ornitólogos de Costa Rica

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