বৰাশগুণ

তথ্যসূত্ৰ

1. ↑ N.N. Dutta et al, Annals of Biological Research, 2011, 2 (5):374-384
2. ↑ Raptors of the World by Ferguson-Lees, Christie, Franklin, Mead & Burton. Houghton Mifflin (2001), ISBN 0-618-12762-3
3. ↑ Ali, Sálim. (1996). The Book of Indian Birds. Bombay Natural History Society. ISBN 0-19-563731-3
4. ↑ Carey, James R. Longevity Records: Life Spans of Mammals, Birds, Amphibians, Reptiles, and Fish. Monographs on Population Aging, 8. Odense University Press
5. ↑ Gavashelishvili, A.; McGrady, M. J. (2006). Breeding site selection by bearded vulture (Gypaetus barbatus) and Eurasian griffon (Gyps fulvus) in the Caucasus. Animal Conservation. পৃ. 159–170
6. ↑ Gavashelishvili, A.; McGrady, M. J. (2006). Geographic information system-based modelling of vulture response to carcass appearance in the Caucasus. Journal of Zoology. পৃ. 365–372
7. ↑ Gavashelishvili, A. (2005). Vulture movements in the Caucasus. Vulture News. পৃ. 28–29
8. ↑ McGrady, M. J.; Gavashelishvili, A. (2006). Tracking vultures from the Caucasus into Iran. Podoces. পৃ. 21–26