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Title: How Many Azores Bullfinches (Pyrrhula murina) Are There in the World? Case Study of a Threatened Species
Authors: Costa, Tarso de M. M.
Gil, Artur 
Timóteo, Sérgio 
Ceia, Ricardo S.
Coelho, Rúben 
de la Cruz Martin, Azucena
Keywords: bird census; conservation; Pyrrhula murina; oceanic islands; Macaronesia; Laurel Forest
Issue Date: 2023
Publisher: MDPI
Project: LIFE program of the European Commission and the Azores Government 
FCT grant UID/BIA/04004/2020 
Serial title, monograph or event: Diversity
Volume: 15
Issue: 5
Abstract: The Azores bullfinch (Pyrrhula murina Godman, 1866) is a rare Passeriformes endemic from the eastern part of São Miguel Island, Azores, Portugal. This bird was almost considered extinct in the first half of the 20th century, but due to recent conservation measures, it has experienced a recovery since the beginning of the 2000s. Despite the attention given to this bird, the size of its population is still controversial, and the most recent studies present significant divergences on this behalf. The purpose of the present study is to present data from the long-term monitoring and results of the third single-morning survey of the Azores bullfinch to update information about the population size and range of this species. In addition, we performed a literature review to highlight the limitations and advantages of the different approaches for monitoring this species. The Azores Bullfinch records during the single-morning survey indicated a reduction in the extent of occurrence and area of occupancy of this species in comparison with the previous studies, despite the increase in bird detection. However, we suggest that the distribution range of this species needs further analysis concerning its area to exclude non suitable habitats from this analysis. In this study, we conclude that the most likely size of the Azores bullfinch population is 500 to 800 couples, with a slow population growth tendency and an area of distribution of 136.5 km2.
ISSN: 1424-2818
DOI: 10.3390/d15050685
Rights: openAccess
Appears in Collections:FCTUC Ciências da Vida - Artigos em Revistas Internacionais
I&D CFE - Artigos em Revistas Internacionais

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