4 thoughts on “Red-necked Nightjar (Caprimulgus ruficollis): Revise global status?”
The window for consultation is now closed and we are unable to accept any more comments until 21 February 2022. We will now analyse and interpret the new information, and we will post a preliminary decision on this species’s Red List status on this page on 21 February 2022, when discussions will re-open.
Based on new demographic information supplied via email (per C. Camacho and P. Sáez Gómez in litt. 2022), the generation length of this species has now been revised to 4.7 years, with a three generation length equating to 14.1 years. Mean annual adult survival is revise to 0.725 (median of 0.71 in females and 0.74 in males) and longevity to 14 years. Additional information on the calculation of population trend indicates that the annual reduction rate of –2.3% between 2008 and 2018 for Spain is the appropriate trend data for this part of the population (C. Camacho and P. Sáez Gómez in litt. 2022), and that this is a fitted trend to multiyear data hence should not be further fitted to an exponential function. Rather the estimated rate of reduction is simply this value multiplied across the three-generation period, which is equivalent to a decline of 32%.
There is little information on either the current trend of the population in North Africa, nor even on the proportion of the global population breeding away from the Iberian Peninsula. There is the potential for significant numbers to breed in areas that have not undergone recent major changes in urbanisation, however the climate change is altering fire frequency and intensity throughout the range, and habitat conversion or degradation impacts may affect this species in many areas. In the absence of data for what may be a substantial proportion of the species’s population it is not considered appropriate to extrapolate the rate of decline to the whole. The level of concern and prevalence of the likely drivers of the reduction suggest there is a moderately rapid overall population decline occurring and that the rate of this decline approaches the thresholds for listing the species as threatened.
As such, our preliminary proposal for the 2022.1 Red List would be to list Red-necked Nightjar as Near Threatened, approaching the threshold for listing as threatened under Criteria A2bce+3bce+4bce.
There is now a period for further comments until the final deadline on 27 February 2022, after which the recommended categorisations will be put forward to IUCN.
The final 2022.1 Red List categories will be published on the BirdLife and IUCN websites in July 2022, following further checking of information relevant to the assessments by both BirdLife and IUCN.
The window for consultation is now closed and we are unable to accept any more comments. We will analyse and interpret the new information, and we will post a final decision on this species’ Red List status on this page on 7 March 2022.
Recommended categorisation to be put forward to IUCN
The final categorisation for this species has not changed, but the account for this species has been updated to incorporate additional information from this discussion. Red-necked Nightjar is recommended to be listed as Near Threatened, approaching the threshold for listing as threatened under Criteria A2bce+3bce+4bce.
Many thanks for everyone who contributed to the 2022.1 GTB Forum process. The final 2022.1 Red List categories will be published on the BirdLife and IUCN websites in July 2022, following further checking of information relevant to the assessments by both BirdLife and IUCN.
The window for consultation is now closed and we are unable to accept any more comments until 21 February 2022. We will now analyse and interpret the new information, and we will post a preliminary decision on this species’s Red List status on this page on 21 February 2022, when discussions will re-open.
Preliminary proposal
Based on new demographic information supplied via email (per C. Camacho and P. Sáez Gómez in litt. 2022), the generation length of this species has now been revised to 4.7 years, with a three generation length equating to 14.1 years. Mean annual adult survival is revise to 0.725 (median of 0.71 in females and 0.74 in males) and longevity to 14 years. Additional information on the calculation of population trend indicates that the annual reduction rate of –2.3% between 2008 and 2018 for Spain is the appropriate trend data for this part of the population (C. Camacho and P. Sáez Gómez in litt. 2022), and that this is a fitted trend to multiyear data hence should not be further fitted to an exponential function. Rather the estimated rate of reduction is simply this value multiplied across the three-generation period, which is equivalent to a decline of 32%.
There is little information on either the current trend of the population in North Africa, nor even on the proportion of the global population breeding away from the Iberian Peninsula. There is the potential for significant numbers to breed in areas that have not undergone recent major changes in urbanisation, however the climate change is altering fire frequency and intensity throughout the range, and habitat conversion or degradation impacts may affect this species in many areas. In the absence of data for what may be a substantial proportion of the species’s population it is not considered appropriate to extrapolate the rate of decline to the whole. The level of concern and prevalence of the likely drivers of the reduction suggest there is a moderately rapid overall population decline occurring and that the rate of this decline approaches the thresholds for listing the species as threatened.
As such, our preliminary proposal for the 2022.1 Red List would be to list Red-necked Nightjar as Near Threatened, approaching the threshold for listing as threatened under Criteria A2bce+3bce+4bce.
There is now a period for further comments until the final deadline on 27 February 2022, after which the recommended categorisations will be put forward to IUCN.
The final 2022.1 Red List categories will be published on the BirdLife and IUCN websites in July 2022, following further checking of information relevant to the assessments by both BirdLife and IUCN.
The window for consultation is now closed and we are unable to accept any more comments. We will analyse and interpret the new information, and we will post a final decision on this species’ Red List status on this page on 7 March 2022.
Recommended categorisation to be put forward to IUCN
The final categorisation for this species has not changed, but the account for this species has been updated to incorporate additional information from this discussion. Red-necked Nightjar is recommended to be listed as Near Threatened, approaching the threshold for listing as threatened under Criteria A2bce+3bce+4bce.
Many thanks for everyone who contributed to the 2022.1 GTB Forum process. The final 2022.1 Red List categories will be published on the BirdLife and IUCN websites in July 2022, following further checking of information relevant to the assessments by both BirdLife and IUCN.