7 thoughts on “Schrenck’s Bittern (Ixobrychus eurhythmus)”
A population decline in its breeding grounds in the Amur region, Russia Far East, is very likely, as the frequency of fires has increased, leaving few patches of suitable reedbeds for the species. In this study, Schrenck´s Bittern was only detected in a transect not affected by fire in the same year (but sample size not significant): https://link.springer.com/article/10.1007/s10531-019-01746-3
We only have 5 confirmed, documented records of the species in the main Philippine islands in the last 25 years; plus a few more in the Babuyans and Batanes.
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 contributors for the information shared in the above comments. This will be incorporated into the updated species factsheet. 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.
Streams in lowland broadleaved forests appear to be an important wintering habitat for the species in Singapore and Malaysia, and marginally in mangroves. The species appear to be able to tolerate some forest disturbance, and camera traps have found birds in highly degraded woodland.
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
The final categorisation for this species has not changed. Schrenck’s Bittern 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.
A population decline in its breeding grounds in the Amur region, Russia Far East, is very likely, as the frequency of fires has increased, leaving few patches of suitable reedbeds for the species. In this study, Schrenck´s Bittern was only detected in a transect not affected by fire in the same year (but sample size not significant): https://link.springer.com/article/10.1007/s10531-019-01746-3
At Muraviovka Park, the population was estimated at 20-30 calling males in 2013 (see https://static1.squarespace.com/static/5c1a9e03f407b482a158da87/t/602538a595b66d0de64514ee/1613052077725/Muraviovka-Park.pdf). Populations of similar sizes are likely found in other nature reserves along the Amur river and its tributaries, so the population in the Amur region likely numbers 100s-1000s of individuals. Information on densities in the Amur region are summarized in the Red Data Book of the Amur region: https://redbook28.ru/zhivotnye/pticy/amurskij-volchok/
We only have 5 confirmed, documented records of the species in the main Philippine islands in the last 25 years; plus a few more in the Babuyans and Batanes.
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 contributors for the information shared in the above comments. This will be incorporated into the updated species factsheet. 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.
Streams in lowland broadleaved forests appear to be an important wintering habitat for the species in Singapore and Malaysia, and marginally in mangroves. The species appear to be able to tolerate some forest disturbance, and camera traps have found birds in highly degraded woodland.
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
The final categorisation for this species has not changed. Schrenck’s Bittern 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.