7 thoughts on “Striated Softtail (Thripophaga macroura)”
I agree with the change. In Bahia (Boa Nova, Macarani) the species resists fragmentation well, likes edges and is frequent. NT is a more appropriate category.
The proposal seems reasonable, but note that this Brazilian endemic species is currently listed on the National Red List assessment as VU by criteria C2a(i). The proposed change would therefore take the global and national assessments out of sync.
Text from SALVE:
“Thripophaga macroura é endêmica do Brasil, ocorrendo no centro-sul da Bahia, nordeste de Minas Gerais, Espírito Santo e historicamente no norte do Rio de Janeiro. Ocupa florestas de baixada e submontanas, com densos emaranhados de lianas, dependendo de matas em bom estado de conservação para sobreviver. Suspeita-se que haja menos de 10.000 indivíduos maduros, sendo que há menos de 1.000 em cada subpopulação. A população está altamente fragmentada, com pouca ou nenhuma possibilidade de conexão, e há declínio populacional continuado devido à perda de habitat. Dessa forma, T. macroura foi categorizada como Vulnerável (VU) pelo critério C2a(i).”
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 25 April 2025. We will now analyse and interpret the information, and we will post a preliminary decision on this species’ Red List category on this page on 25 April 2025, when discussions will re-open.
We thank all contributors for the information shared in the above comments. This will be incorporated into the updated species factsheet. The mismatch with the National Red List for Brazil is noted. The Brazilian Red List was used as the primary source of data for this assessment. However, we have determined that there is insufficient evidence to estimate (i.e. the minimum standard of evidence required for listing under Criterion C as per the IUCN Guidelines) that the largest subpopulation contains 1,000 or fewer mature individuals.
Based on available information, our preliminary proposal for the 2025 Red List would be to adopt the proposed classification outlined in the initial forum discussion.
There is now a period for further comments until the final deadline on 4 May 2025, after which the recommended categorisations will be put forward to IUCN.
The final 2025 Red List categories will be published on the BirdLife and IUCN websites in October 2025, following further checking of information relevant to the assessments by both BirdLife and IUCN.
To use criterion C, the number of mature individuals must be estimated (i.e. the minimum standard of evidence required for listing under Criterion C according to the IUCN Guidelines) and cannot be inferred or suspected. In the national assessment, ICMBio will disregard this inferred data in the next assessment.
In addition, it is written above that there is only a suspicion of population decline based on habitat loss and degradation. Adding to this, what Edson Luiz said, “the species resists fragmentation well, likes edges, and is frequent”, perhaps it should be considered that this species is LC.
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 a final decision on this species’ Red List category will be posted on this page on 12 May 2025.
Recommended categorisation to be put forward to IUCN
We thank all contributors for their comments.
To be listed as threatened under Criterion C it is true that the population size must be estimated – it cannot be inferred or suspected (see IUCN Standards and Petitions Committee 2024). A listing as Near Threatened only requires a species to approach threatened thresholds however. Although not estimated, the population size threshold can be considered to be nearly met when the population size is suspected/inferred to be <10,000 mature individuals. The inferred population size in this instance is thus enough to qualify the species as Near Threatened under Criterion C given there is also a suspected decline and potentially a single subpopulation.
The final categorisation for this species has not changed. Striated Softtail is recommended to be listed as Near Threatened, approaching thresholds under Criterion C2a(ii).
Many thanks for everyone who contributed to the 2025.2 GTB Forum process. The final Red List categories will be published on the BirdLife and IUCN websites in October 2025, following further checking of information relevant to the assessments by both BirdLife and IUCN.
I agree with the change. In Bahia (Boa Nova, Macarani) the species resists fragmentation well, likes edges and is frequent. NT is a more appropriate category.
The proposal seems reasonable, but note that this Brazilian endemic species is currently listed on the National Red List assessment as VU by criteria C2a(i). The proposed change would therefore take the global and national assessments out of sync.
Text from SALVE:
“Thripophaga macroura é endêmica do Brasil, ocorrendo no centro-sul da Bahia, nordeste de Minas Gerais, Espírito Santo e historicamente no norte do Rio de Janeiro. Ocupa florestas de baixada e submontanas, com densos emaranhados de lianas, dependendo de matas em bom estado de conservação para sobreviver. Suspeita-se que haja menos de 10.000 indivíduos maduros, sendo que há menos de 1.000 em cada subpopulação. A população está altamente fragmentada, com pouca ou nenhuma possibilidade de conexão, e há declínio populacional continuado devido à perda de habitat. Dessa forma, T. macroura foi categorizada como Vulnerável (VU) pelo critério C2a(i).”
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 25 April 2025. We will now analyse and interpret the information, and we will post a preliminary decision on this species’ Red List category on this page on 25 April 2025, when discussions will re-open.
Preliminary proposal
We thank all contributors for the information shared in the above comments. This will be incorporated into the updated species factsheet. The mismatch with the National Red List for Brazil is noted. The Brazilian Red List was used as the primary source of data for this assessment. However, we have determined that there is insufficient evidence to estimate (i.e. the minimum standard of evidence required for listing under Criterion C as per the IUCN Guidelines) that the largest subpopulation contains 1,000 or fewer mature individuals.
Based on available information, our preliminary proposal for the 2025 Red List would be to adopt the proposed classification outlined in the initial forum discussion.
There is now a period for further comments until the final deadline on 4 May 2025, after which the recommended categorisations will be put forward to IUCN.
The final 2025 Red List categories will be published on the BirdLife and IUCN websites in October 2025, following further checking of information relevant to the assessments by both BirdLife and IUCN.
To use criterion C, the number of mature individuals must be estimated (i.e. the minimum standard of evidence required for listing under Criterion C according to the IUCN Guidelines) and cannot be inferred or suspected. In the national assessment, ICMBio will disregard this inferred data in the next assessment.
In addition, it is written above that there is only a suspicion of population decline based on habitat loss and degradation. Adding to this, what Edson Luiz said, “the species resists fragmentation well, likes edges, and is frequent”, perhaps it should be considered that this species is LC.
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 a final decision on this species’ Red List category will be posted on this page on 12 May 2025.
Recommended categorisation to be put forward to IUCN
We thank all contributors for their comments.
To be listed as threatened under Criterion C it is true that the population size must be estimated – it cannot be inferred or suspected (see IUCN Standards and Petitions Committee 2024). A listing as Near Threatened only requires a species to approach threatened thresholds however. Although not estimated, the population size threshold can be considered to be nearly met when the population size is suspected/inferred to be <10,000 mature individuals. The inferred population size in this instance is thus enough to qualify the species as Near Threatened under Criterion C given there is also a suspected decline and potentially a single subpopulation.
The final categorisation for this species has not changed. Striated Softtail is recommended to be listed as Near Threatened, approaching thresholds under Criterion C2a(ii).
Many thanks for everyone who contributed to the 2025.2 GTB Forum process. The final Red List categories will be published on the BirdLife and IUCN websites in October 2025, following further checking of information relevant to the assessments by both BirdLife and IUCN.