I would strongly advise against this. Trumpeters are among the first species to get hammered by overhunting because they are naturally unwary. You have to trek FAR (often at least a day) from rivers used by hunters to locate any.
I agree with Dan Brooks’ comment. As for Black curassow, an intact forest cover is not a garantee for a healthy population of Grey-winged trumpeter. The extant of hunting areas may be a better proxy of the threat on these species (“The empty forest”)
You can update references for densities from Denis et al 2018, for undisturbed sites in french Guiana : mean 17.08 ind/km2,(SD10.31) in 21 non-hunted sites. However, densities in hunted sites are drastically reduced (Vaessen et al, submitted publication, from same data sets), down to ~2 ind/km2 in hunted places.
DENIS, T., HÉRAULT, B., BRUNAUX, O., GUITET, S., RICHARD-HANSEN, C. 2018 Weak environmental controls on the composition and diversity of medium and large-sized vertebrate assemblages in Neotropical rainforests of the Guiana Shield. Diversity and Distribution, 24: 1545-1559
VAESSEN R.W.T., DENIS, T, VAN KUIJK, JANSEN, M P.A. RICHARD-HANSEN, C. Hunting affects the functional composition of vertebrate communities in a Neotropical rainforest. submitted to Conservation Biology
Many thanks to everyone who has contributed to this discussion. We greatly appreciate the time and effort invested by so many people in commenting. The window for consultation is now closed. We will analyse and interpret the new information and post a preliminary decision on this species’s Red List status on this page in early July.
Thank you once again,
BirdLife Red List Team
Based on available information, our preliminary proposal for the 2021 Red List would be to adopt the proposed classifications outlined in the initial forum discussion.
This species has a very large range, over which the overall rate of deforestation has been very slow over the past three generations (23 years). Although the species’s population size may be experiencing additional declines due to hunting and forest degradation, there is no evidence that these threats have substantially increased, and even if these threats led to a rate of population decline that is three times the rate of forest loss, the species would still not meet the thresholds for listing as Near Threatened under Criterion A. Therefore, our preliminary decision is to list the species as Least Concern. If future evidence indicates that the species’s population is undergoing a more rapid decline, the species may be moved to a higher category of threat in the future.
There is now a period for further comments until the final deadline in mid-July, after which the recommended categorisations will be put forward to IUCN.
The final 2021 Red List categories will be published on the BirdLife and IUCN websites in December 2021, following further checking of information relevant to the assessments by both BirdLife and IUCN.
Recommended categorisation to be put forward to IUCN
The final categorisation for this species has not changed. Grey-winged Trumpeter is recommended to be listed as Least Concern.
Many thanks for everyone who contributed to the 2021 GTB Forum process. The final 2021 Red List categories will be published on the BirdLife and IUCN websites in December 2021, following further checking of information relevant to the assessments by both BirdLife and IUCN.
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Contact the BirdLife Red List Team under redlistteam [at] birdlife [dot] org.