To expand on the explanation of the revised preliminary proposal and now recommended proposal (see below), a revised range map for the species was produced:
Grey-backed Hawk (Pseudastur occidentalis)
Grey-backed Hawk (Pseudastur occidentalis)
To expand on the explanation of the revised preliminary proposal and now recommended proposal (see below), a revised range map for the species was produced:
Take a look to this reference:
Lucy E. Seminario Moscol & Armando Ugaz Cherre (2017). Primer registro de Pseudastur occidentalis en el bosque de Suyo, Ayabaca, Piura, Perú. Boletín de la Unión de Ornitólogos del Perú (UNOP), 12(2): 34-38.
https://boletinunop.weebly.com/uploads/6/2/2/6/62265985/boletin_unop_vol._12_n%C2%B02_2017_-_seminario.pdf
A mail was sent to the red list team. +Assessment
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
Based on available information and following information received from Manuel Sanchez Nivecela, our proposal for the 2024 Red List is to pend the decision on this species and keep the discussion open, while leaving the current Red List category unchanged.
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.
Preliminary proposal
We thank both contributors to this discussion and appreciate the additional information supplied by Manuel Sánchez Nivicela that allowed a further improvement to the distribution map and greater confidence in the population size, but importantly also noting additional information allowing the inference of a continuing decline in the number of mature individuals. In additional to ongoing loss of forest, Blandariz et al. conducted a structured interview with 56 experts to derive an index of relative reduction. This species was scored as having the highest ‘retraction’ value, indicating loss of the species from previously occupied sites (Blandariz et al. 2023).
Based on this information, our preliminary proposal for the 2024 Red List would be to list Grey-backed Hawk as Vulnerable under Criterion C2a(ii).
There is now a period for further comments until the final deadline on 13 May 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 October 2024, following further checking of information relevant to the assessments by both BirdLife and IUCN.
Additional reference
Blandariz, S.R., Macías, A.E.S., Véliz, R.S.S. and Figueroa, F.J.C. 2023. Perception of biodiversity in the Pisloy community, Jipijapa, Manabí, Ecuador. South Florida Journal of Development 4(5): 1906-1927.
It’s important to considered that this raptor is not frequently reported from proper dry forests tumbesian regions or it is reported in lower numbers (the Blandariz et al. 2023 paper is a signal. Also, the coastal cordillera of Engunga or Zapotal and Montalvo *see eBird are a signal of lack of presence despite “adequate habitat”), if compared with with foothills (base of the western Andes in Ecuador) were records are continuous or certain semi humid regions or cordilleras near the coasts of Ecuador (E.g., Chongón-Colonche). This indicates that this species is dealing with habitat loss and other pressures (e.g., hunting). Its concentration on the narrow base of the ecuadorian western Andes and more humid regions also demonstrates that competition for territory with other raptors could be a constant, plus the continuous reduction of adequate habitat caused by historical and current deforestation in the lower montane regions of west Ecuador and northwest Peru. It is crucial to continue considering this raptor as globally Endangered until a proper research (E.g., satellital tracking) takes place to known the territory size and the habitat that this species depends on. Apparently, this species is transitioning between dry-forests tumbesian region to those regions were the tumbesian landscape meets the western humid foothills or semihumid mountains of western Andes of Peru and Ecuador.
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 available information, posting a final decision on this species’ Red List status on this page on 20 May 2024.
Recommended categorisation to be put forward to IUCN
The final categorisation for this species has not changed. Grey-backed Hawk is recommended to be listed as Vulnerable under Criterion C2a(ii).
Many thanks for everyone who contributed to the 2024.2 GTB Forum process. The final 2024 Red List categories will 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.
To expand on the explanation of the revised preliminary proposal and now recommended proposal, a revised range map for the species was produced (posted above) and new plausible boundaries estimated for the population size. While acknowledging the concern expressed based on the limited number of records, the assessment must take into account that there has been little observer effort in much of the range and additional effort is generating more observations, suggesting that the population is unlikely to be very small.