9 thoughts on “Rufous-sided Pygmy-tyrant (Euscarthmus rufomarginatus)”
Some modelling of the availability of ‘campo limpo’ cerrado formations would inform likely trends in this species. It is still restricted to these open humid grassy habitats which are the first to go under the plough.
Like C.caudacuta, E.ruformarginatus is associated with specific environments in the Cerrado biome. In the state of Bahia, the locations where it occurs have been severely degraded by large agribusiness companies (Barreiras, São Desidério, Cocos, Luis Eduardo Magalhães), and it is currently only seen in patches in a landscape of native vegetation amidst a very altered surrounding landscape. Minimally, I consider the species to be near threatened.
Least Concern seems appropriate. This was also the conclusion of the last Brazilian national assessment, carried out in 2019 (not yet published).
There is no information about the population or its trend. There is habitat loss due to the expansion of monocultures and livestock but its distribution is very wide and it does not appear that current threats could bring it to the thresholds of extinction risk in the near future.
In Paraguay the species is only known from a specimen collected in 1940, and was considered Data Deficient at the national level in the most recent assessment (2017). Cerrado habitats are rapidly disappearing in the country, most recently with the expansion of extensive Eucalyptus plantations into this ecoregion.
Many thanks to everyone who has contributed to this discussion. We greatly appreciate the time and effort invested in commenting. The window for consultation is now closed and we are unable to accept any more comments until 12 February 2024. We will now analyse and interpret the information, and we will post a preliminary decision on this species’ Red List status on this page on 12 February 2024, when discussions will re-open.
Based on available information, our preliminary proposal for the 2024 Red List would be to adopt the proposed classifications outlined in the initial forum discussion.
There is now a period for further comments until the final deadline on 18 February 2024, after which the recommended categorisations will be put forward to IUCN.
The final 2024 Red List categories will be published on the BirdLife and IUCN websites in December 2024, following further checking of information relevant to the assessments by both BirdLife and IUCN.
Many thanks to everyone who has contributed to this discussion. We greatly appreciate the time and effort invested in commenting. The window for consultation is now closed and we are unable to accept any more comments. We will analyse and interpret the information, and we will post a final decision on this species’ Red List status on this page on 26 February 2024.
Recommended categorisation to be put forward to IUCN
The final categorisation for this species has not changed. Rufous-sided Pygmy-tyrant is recommended to be listed as Least Concern.
Many thanks for everyone who contributed to the 2024.1 GTB Forum process. The final 2024 Red List categories will now be published on the BirdLife and IUCN websites in October 2024, following further checking of information relevant to the assessments by both BirdLife and IUCN.
Some modelling of the availability of ‘campo limpo’ cerrado formations would inform likely trends in this species. It is still restricted to these open humid grassy habitats which are the first to go under the plough.
Like C.caudacuta, E.ruformarginatus is associated with specific environments in the Cerrado biome. In the state of Bahia, the locations where it occurs have been severely degraded by large agribusiness companies (Barreiras, São Desidério, Cocos, Luis Eduardo Magalhães), and it is currently only seen in patches in a landscape of native vegetation amidst a very altered surrounding landscape. Minimally, I consider the species to be near threatened.
Least Concern seems appropriate. This was also the conclusion of the last Brazilian national assessment, carried out in 2019 (not yet published).
There is no information about the population or its trend. There is habitat loss due to the expansion of monocultures and livestock but its distribution is very wide and it does not appear that current threats could bring it to the thresholds of extinction risk in the near future.
Update: The national assessment of this species was carried out in 2018 and has already been published in:
Marini, M.A.; Lima, D.M.; Carvalho, C.B.; Ubaid, F.K.; Silva, G.B.M.; Abreu, T.L.S.; Oliveira, T.D.; Alves, W.N.; Dias, F.F.; Alquezar, R.D. 2023. Euscarthmus rufomarginatus (Pelzeln, 1868). Sistema de Avaliação do Risco de Extinção da Biodiversidade – SALVE.
Available in: https://salve.icmbio.gov.br DOI: 10.37002/salve.ficha.22530 – Accessed: 02 de fev. de 2024.
In Paraguay the species is only known from a specimen collected in 1940, and was considered Data Deficient at the national level in the most recent assessment (2017). Cerrado habitats are rapidly disappearing in the country, most recently with the expansion of extensive Eucalyptus plantations into this ecoregion.
Many thanks to everyone who has contributed to this discussion. We greatly appreciate the time and effort invested in commenting. The window for consultation is now closed and we are unable to accept any more comments until 12 February 2024. We will now analyse and interpret the information, and we will post a preliminary decision on this species’ Red List status on this page on 12 February 2024, when discussions will re-open.
Preliminary proposal
Based on available information, our preliminary proposal for the 2024 Red List would be to adopt the proposed classifications outlined in the initial forum discussion.
There is now a period for further comments until the final deadline on 18 February 2024, after which the recommended categorisations will be put forward to IUCN.
The final 2024 Red List categories will be published on the BirdLife and IUCN websites in December 2024, following further checking of information relevant to the assessments by both BirdLife and IUCN.
Many thanks to everyone who has contributed to this discussion. We greatly appreciate the time and effort invested in commenting. The window for consultation is now closed and we are unable to accept any more comments. We will analyse and interpret the information, and we will post a final decision on this species’ Red List status on this page on 26 February 2024.
Recommended categorisation to be put forward to IUCN
The final categorisation for this species has not changed. Rufous-sided Pygmy-tyrant is recommended to be listed as Least Concern.
Many thanks for everyone who contributed to the 2024.1 GTB Forum process. The final 2024 Red List categories will now be published on the BirdLife and IUCN websites in October 2024, following further checking of information relevant to the assessments by both BirdLife and IUCN.