বিহুৱতী চৰাই

অসমীয়া ৱিকিপিডিয়াৰ পৰা
বিহুৱতী চৰাই (Common Iora)
সংৰক্ষণ স্থিতি
জীৱবৈজ্ঞানিক শ্ৰেণীবিভাজন
জগৎ/ৰাজ্য: Animalia
পৰ্ব: Chordata
শ্ৰেণী: Aves
বৰ্গ: Passeriformes
পৰিয়াল: Aegithinidae
গণ: Aegithina
প্ৰজাতি: A. tiphia
বৈজ্ঞানিক নাম
Aegithina tiphia
(Linnaeus, 1758)

বিহুৱতী চৰাই[2] (ইংৰাজী: Common Iora, বৈজ্ঞানিক নাম-Aegithina tiphia) এবিধ সৰু আকাৰৰ চৰাইৰ প্ৰজাতি ৷ ই বিষুৱীয় অঞ্চলত, প্ৰধানকৈ এছিয়া মহাদেশত বহুলভাৱে বিস্তৃত হৈ আছে৷ i

বিৱৰণ[সম্পাদনা কৰক]

Ioras have a pointed and notched beak with a culmen that is straight. The Common Iora is sexually dimorphic, males in the breeding season have a black cap and back adding to a black wing and tail at all seasons. Females have greenish wings and an olive tail. The undersides of both are yellow and the two white bars on the wings of the male are particularly prominent in their breeding plumage. The males in breeding plumage have a very variable distribution of the black on the upperparts and can be confused with Marshall's Iora, however, the latter always has white tips to the tail.[3]

টেক্স'নমি[সম্পাদনা কৰক]

ইয়াৰ বৰ্তমানলৈকে চিনাক্ত কৰা উপ-প্ৰজাতি সমূহ হ'ল-

  • The nominate subspecies is found along the Himalayas and males of this population are very similar to females or have only a small amount of black on the crown.
  • In northwestern India, septentrionalis is brighter yellow than others and
  • in the northern plains of India humei males in breeding plumage have a black cap and olive on the upper mantle.
  • In southwestern India and Sri Lanka multicolor has the breeding males with a jet black cap and mantle.[3][4][5]

আচৰণ[সম্পাদনা কৰক]

এই শব্দটোৰ বিষয়ে বিহুৱতী চৰাইৰ মাত

খাদ্য[সম্পাদনা কৰক]

Ioras forage in trees in small groups, gleaning among the branches for insects. They sometimes join mixed species feeding flocks. The call is a mixture of churrs, chattering and whistles, and the song is a trilled wheeeee-tee. They may sometimes imitate the calls of other birds such as drongos.[6]

প্ৰজনন[সম্পাদনা কৰক]

During the breeding season, mainly after the monsoons, the male performs an acrobatic courtship display, darting up into the air fluffing up all his feathers, especially those on the pale green rump, then spiralling down to the original perch. Once he lands, he spreads his tail and droops his wings.[4] Two to four greenish white eggs are laid in a small and compact cup-shaped nest made out of grass and bound with cobwebs and placed in the fork of a tree. Both male and female incubate[7] and eggs hatch after about 14 days. Nests predators include snakes, lizards, crow-pheasant and crows.[8] Nests may also be brood-parasitized by the Banded Bay Cuckoo.[9]

আলোকচিত্ৰৰ ভঁৰাল[সম্পাদনা কৰক]

তথ্যসুত্ৰ[সম্পাদনা কৰক]

  1. BirdLife International (2012). "Aegithina tiphia". IUCN Red List of Threatened Species. Version 2012.1. International Union for Conservation of Nature. http://www.iucnredlist.org/apps/redlist/details/106006147। 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. 344–346. 
  4. 4.0 4.1 Baker, ECS (1922). Fauna of British India. Birds. Volume 1 (2 সম্পাদনা). Taylor and Francis, London. পৃষ্ঠা. 339–343. http://www.archive.org/stream/faunaofbritishin01bake#page/339/mode/1up. 
  5. {{cite journal|author=Wells, D.R., E.C. Dickinson & R.W.R.J. Dekker| title= Systematic notes on Asian birds. 34
  6. Bharos, A. M. K. (1998). "Mimicry by common Iora Aegithina tiphia". J. Bombay Nat. Hist. Soc. খণ্ড 95 (1): 116. 
  7. Wesley,H Daniel (1984). "Frequency and duration of incubation of the eggs for Aegithina tiphia". J. Bombay Nat. Hist. Soc. খণ্ড 81 (1): 193–195. 
  8. Ali,S (1931). "Casualties among the eggs and young of small birds". J. Bombay Nat. Hist. Soc. খণ্ড 34 (4): 1062–1067. 
  9. Ali, S & SD Ripley (1996). Handbook of the Birds of India and Pakistan. Volume 6 (2 সম্পাদনা). Oxford University Press. পৃষ্ঠা. 47–54. 

বাহ্যিক সংযোগ[সম্পাদনা কৰক]