| উদ্ধৃতি | IUCN, 2011 IUCN Red List of Threatened Species. Version 2011.2. IUCN 2011. IUCN Red List of Threatened Species. www.iucnredlist.org. Downloaded in November 2011. |
| সূত্র | 89450 IUCN, 2011 |
| পৃষ্ঠা | |
| Named Used as Valid | Biarctus sordidus |
| এলাকা | |
| Distribution |