The EOO was estimated using a minimum convex polygon based on all known occurrence records available up to 2023, resulting in an inferred EOO of 2,168 km². The AOO was estimated using climatic niche modelling implemented in MaxEnt. Niche conservatism was assumed among all constituent taxa of the Grallaria rufula complex, an assumption supported by niche overlap analyses, and all entities were modelled as a single unit. The AOO corresponding to the Sierra Nevada de Santa Marta population (i.e., G. spatiator) was estimated at 596 km².
Based on these values, Grallaria spatiator potentially meets the thresholds for listing as Endangered (EN) under criterion B1 (EOO) and as Vulnerable (VU) under criterion B2 (AOO), pending confirmation of additional subcriteria related to fragmentation, number of locations, and continuing decline.
These results will be made available in a preprint to be released later this year. The analyses are derived from a master’s thesis conducted within the framework of the project cited above and can be referenced as follows:
Plazas-Cardona, D.J. (2024). Effect of geographic and taxonomic biases on the assessment of extinction risk of species of the genus Grallaria (Aves: Grallariidae) from the Colombian Andes. Master’s thesis. Faculty of Sciences, Universidad Nacional de Colombia. Bogotá, Colombia.
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 2 February 2026. 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 2 February 2026, when discussions will re-open.
Although this species’ range is restricted and habitat loss is ongoing, there is currently no evidence that it is restricted to few locations or is severely fragmented. It therefore approaches, but does not meet, threatened thresholds under Criteria B1+2.
Based on available information therefore, our preliminary proposal for the 2026 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 8 February 2026, after which the recommended categorisations will be put forward to IUCN.
The final 2026 Red List categories will be published on the BirdLife and IUCN websites later this year, 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 a final decision on this species’ Red List category will be posted on this page on 16 February 2026.
Recommended categorisation to be put forward to IUCN
The final categorisation for this species has not changed. Sierra Nevada Antpitta is recommended to be listed as Near Threatened, approaching thresholds under Criteria B1b(iii)+2b(iii).
Many thanks to everyone who contributed to the 2026.1 GTB Forum process. The final Red List categories will be published on the BirdLife and IUCN websites later this year, following further checking of information relevant to the assessments by both BirdLife and IUCN.
Recent work conducted on several Andean species of the genus Grallaria (see https://www.selva.org.co/programas/ciencia-de-la-conservacion/vulnerabilidad-y-conservacion-de-aves-en-los-andes/) has allowed the estimation of Extent of Occurrence (EOO) and Area of Occupancy (AOO) using standardized methods. Among the species assessed is Grallaria spatiator.
The EOO was estimated using a minimum convex polygon based on all known occurrence records available up to 2023, resulting in an inferred EOO of 2,168 km². The AOO was estimated using climatic niche modelling implemented in MaxEnt. Niche conservatism was assumed among all constituent taxa of the Grallaria rufula complex, an assumption supported by niche overlap analyses, and all entities were modelled as a single unit. The AOO corresponding to the Sierra Nevada de Santa Marta population (i.e., G. spatiator) was estimated at 596 km².
Based on these values, Grallaria spatiator potentially meets the thresholds for listing as Endangered (EN) under criterion B1 (EOO) and as Vulnerable (VU) under criterion B2 (AOO), pending confirmation of additional subcriteria related to fragmentation, number of locations, and continuing decline.
These results will be made available in a preprint to be released later this year. The analyses are derived from a master’s thesis conducted within the framework of the project cited above and can be referenced as follows:
Plazas-Cardona, D.J. (2024). Effect of geographic and taxonomic biases on the assessment of extinction risk of species of the genus Grallaria (Aves: Grallariidae) from the Colombian Andes. Master’s thesis. Faculty of Sciences, Universidad Nacional de Colombia. Bogotá, Colombia.
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 2 February 2026. 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 2 February 2026, when discussions will re-open.
Preliminary proposal
We thank all contributors for their comments.
Although this species’ range is restricted and habitat loss is ongoing, there is currently no evidence that it is restricted to few locations or is severely fragmented. It therefore approaches, but does not meet, threatened thresholds under Criteria B1+2.
Based on available information therefore, our preliminary proposal for the 2026 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 8 February 2026, after which the recommended categorisations will be put forward to IUCN.
The final 2026 Red List categories will be published on the BirdLife and IUCN websites later this year, 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 a final decision on this species’ Red List category will be posted on this page on 16 February 2026.
Recommended categorisation to be put forward to IUCN
The final categorisation for this species has not changed. Sierra Nevada Antpitta is recommended to be listed as Near Threatened, approaching thresholds under Criteria B1b(iii)+2b(iii).
Many thanks to everyone who contributed to the 2026.1 GTB Forum process. The final Red List categories will be published on the BirdLife and IUCN websites later this year, following further checking of information relevant to the assessments by both BirdLife and IUCN.