ভীমৰাজ

অসমীয়া ৱিকিপিডিয়াৰ পৰা
ভীমৰাজ (Greater Racket-tailed Drongo)
Nominate race from Kerala
সংৰক্ষণ স্থিতি
জীৱবৈজ্ঞানিক শ্ৰেণীবিভাজন
জগৎ/ৰাজ্য: Animalia
পৰ্ব: Chordata
শ্ৰেণী: Aves
বৰ্গ: Passeriformes
পৰিয়াল: Dicruridae
গণ: Dicrurus
প্ৰজাতি: D. paradiseus
বৈজ্ঞানিক নাম
Dicrurus paradiseus
Linnaeus, 1766
সমাৰ্থক

Dissemurus paradiseus
Dissemuroides paradiseus
Edolius grandis

ভীমৰাজ[2] (ইংৰাজী: Greater Racket-tailed Drongo, বৈজ্ঞানিক নাম-Dicrurus paradiseus)এটা মধ্যমীয়া আকাৰৰ চৰাইৰ প্ৰজাতি৷ ইয়াৰ দীঘল তথা বিশেষ আকাৰৰ দুভাগ হৈ থকা নেজৰ বাবে এই চৰাইবিধ খ্যাত৷

বিৱৰণ[সম্পাদনা কৰক]

From the Western Ghats

In most of its range in Asia, this is the largest of the drongo species and is readily identifiable by the distinctive tail rackets and the crest of curled feather that begin in front of the face above the beak and along the crown to varying extents according to the subspecies. The tail with twirled rackets is distinctive and in flight it can appear as if two large bees were chasing a black bird. In the eastern Himalayas the species can be confused with the Lesser Racket-tailed Drongo, however the latter has flat rackets with the crest nearly absent.[3]

The crest size and shape varies across its range

Young birds are duller, and can lack a crest while moulting birds can lack the elongate tail streamers. The racket is formed by the inner web of the vane but appears to be on the outer web since the rachis has a twist just above the spatula.[4]

বিতৰণ তথা বাসস্থান[সম্পাদনা কৰক]

The distribution range of this species extends from the western Himalayas to the eastern Himalayas and Mishmi Hills in the foothills below 4000 feet. Continuing into the west to the islands of Borneo and Java in the east through the mainland and islands. They are found mainly in forest habitats.[5][6]

আচৰণ[সম্পাদনা কৰক]

With growing outer tail feathers (Western Ghats, Kerala)

Their calls are extremely varied and include monotonously repeated whistles, metallic and nasal sounds as well as more complex notes and imitations of other birds. They begin calling from as early as 4 am in moonlight often with a metallic tunk-tunk-tunk series.[7] They have an ability to accurately mimic alarm calls of other birds that are learnt through interactions in mixed-species flocks[8]

খাদ্য[সম্পাদনা কৰক]

Like other drongos, these feed mainly on insects but also feed on fruits and visit flowering trees for nectar. Having short legs, they sit upright and are often perched on high and exposed branches. They are aggressive and will sometimes mob larger birds especially when nesting.[9] They are often active at dusk.[6]

প্ৰজনন[সম্পাদনা কৰক]

The Greater Racket-tailed Drongo is a resident breeder throughout its range. The breeding season in India is April to August. Their courtship display may involve hops and turns on branches with play behaviour involving dropping an object and picking it in mid air.[7] Their cup nest is built in the fork of a tree[3] and the usual clutch is three to four eggs. The eggs are creamy white with blotches of reddish brown which are more dense on the broad end.[9]

তথ্যসুত্ৰ[সম্পাদনা কৰক]

  1. BirdLife International (2012). "Dicrurus paradiseus". IUCN Red List of Threatened Species. Version 2012.1. International Union for Conservation of Nature. http://www.iucnredlist.org/apps/redlist/details/106006048। আহৰণ কৰা হৈছে: 16 July 2012. 
  2. N.N. Dutta et al, Annals of Biological Research, 2011, 2 (5):374-384
  3. 3.0 3.1 Rasmussen PC & JC Anderton (2005). Birds of South Asia: The Ripley Guide. Volume 2. Smithsonian Institution & Lynx Edicions. পৃষ্ঠা. 592–593. 
  4. Ali, Salim (1929). "The racket-feathers of Dissemurus paradiseus". J. Bombay Nat. Hist. Soc. খণ্ড 33 (3): 709–710. 
  5. Peters, JL (1962). Check-list of the birds of the world. Volume 15. Museum of Comparative Zoology. পৃষ্ঠা. 154–156. http://www.archive.org/stream/checklistofbirds151962pete#page/154/mode/2up/search/paradiseus. 
  6. 6.0 6.1 Ali S & SD Ripley (1986). Handbook of the birds of India and Pakistan. 5 (2 সম্পাদনা). Oxford University Press. পৃষ্ঠা. 135–143. 
  7. 7.0 7.1 Neelakantan, KK (1972). "On the Southern Racket-tailed Drongo Dicrurus paradiseus paradiseus (Linn.)". J. Bombay Nat. Hist. Soc. খণ্ড 69 (1): 1–9. 
  8. Goodale, E; Kotagama, SW (2006). "Context-dependent vocal mimicry in a passerine bird" (PDF). Proc. R. Soc. B খণ্ড 273 (1588): 875–880. doi:10.1098/rspb.2005.3392. PMID 16618682. PMC 1560225. http://eben.goodale.googlepages.com/RoyalSoc2006.pdf. 
  9. 9.0 9.1 Whistler, Hugh (1949). Popular handbook of Indian Birds. Fourth edition.. Gurney and Jackson, London. পৃষ্ঠা. 160–161. 

বাহ্যিক সংযোগ[সম্পাদনা কৰক]