টোকোৰা

অসমীয়া ৱিকিপিডিয়াৰ পৰা
টোকোৰা (Black-breasted Weaver)
At Hodal in Faridabad District of Haryana, India.
সংৰক্ষণ স্থিতি
জীৱবৈজ্ঞানিক শ্ৰেণীবিভাজন
জগৎ/ৰাজ্য: Animalia
পৰ্ব: Chordata
শ্ৰেণী: Aves
বৰ্গ: Passeriformes
পৰিয়াল: Ploceidae
গণ: Ploceus
প্ৰজাতি: P. benghalensis
বৈজ্ঞানিক নাম
Ploceus benghalensis
(Linnaeus, 1758)

টোকোৰা (ইংৰাজী: Black-throated Weaver, বৈজ্ঞানিক নাম-Ploceus benghalensis) ভাৰতৰ নদীকাষৰীয়া সমতল ভূমিত দেখা পোৱা এবিধ সৰু আকাৰৰ চৰাইৰ প্ৰজাতি৷ ইহঁতক ঘাইকৈ প্ৰজননৰ সময়ত সঁজা চকুত লগা বিশেষধৰণৰ বাহৰ বাবে জনা যায়৷

বিৱৰণ[সম্পাদনা কৰক]

টোকোৰা চৰাইৰ দেহৰ আকাৰ প্ৰায় ১৫ ছে:মি:৷ Appearance: Male in breeding plumage has brilliant golden-yellow crown, white throat and a black band separating it from the fulvous-white underparts. In non-breeding male and female, crown brown like rest of upper plumage; black pectoral band less developed. A prominent supercilium, a spot behind ear, and narrow moustachial streaks, pale yellow. Flocks about cultivation and around reedy margins of tanks and jheels (shallow lakes), or extensive tall grass areas.[2]

বিতৰণ[সম্পাদনা কৰক]

Resident or local migrant, endemic to South Asia. Species is described as 'common' in at least parts of its range.[3]

From Khyber Pakhtunkhwa to Indus Valley in Pakistan to the Gangetic Plains of northern India, to Assam and the Northeast and Bangladesh; commonly seen in the Himalayan terai; patchy to the south in Gujarat and Andhra Pradesh.

আচৰণ[সম্পাদনা কৰক]

Polygynous; colonial; on the whole similar to those of the Baya and Streaked Weavers.

খাদ্য[সম্পাদনা কৰক]

প্ৰজনন[সম্পাদনা কৰক]

Courtship: Male constructs the nest single-handedly, with a group of females visiting it during late construction stage, jumping on the helmets and tugging and testing, presumably for strength. If a female appears interested, the male bows low before her, presenting golden crown at her. Flaps wings deliberately and sings softly tsi-tsisik-tsisik-tsik-tsik like chirp of cricket or subdued squeaking of unoiled bicycle wheel. Once female agrees and permits copulation, he quickly finishes the rest of the nest, and she lays eggs inside; he immediately commences on a second nest nearby to attract other females, and occasionally a third, very rarely even a fourth. Nests not accepted by females may be torn down by the builder himself.[4]

  • Season: June to September
  • Nest: Similar to the Streaked Weaver; somewhat smaller and normally with shorter entrance tubes. Built in reed-beds in marsh, often moonj or kans (Saccharum spontaneum), with some of the growing reeds incorporated into the dome as support. Entrance tube is somewhat shorter than Baya weavers (up to about 25 cm). At the 'helmet' stage of construction a quantity of wet mud or cowdung is daubed thickly along the edge, with bright coloured scarlet or orange flowers or flower petals (Lantana, Lagerstroemia) incorporated; observations suggest that this is part of the courtship rituals and exercise a direct influence on the reactions of the visiting female, both for this species and the Streaked Weaver.[4]
  • Colony: Singly or in scattered groups of 4 or 5; sometimes larger colonies.
  • Eggs: 3 or 4, white, indistinguishable from those of the other two weavers.

তথ্যসুত্ৰ[সম্পাদনা কৰক]

  1. BirdLife International (2012). "Ploceus benghalensis". IUCN Red List of Threatened Species. Version 2012.1. International Union for Conservation of Nature. http://www.iucnredlist.org/apps/redlist/details/106008543। আহৰণ কৰা হৈছে: 16 July 2012. 
  2. Ali, Salim; J C Daniel (1983). The book of Indian Birds, Twelfth Centenary edition. Bombay Natural History Society/Oxford University Press. 
  3. Grimmett, Richard; Carol Inskipp, and Tim Inskipp (1998). Guide to the Birds of Indian subcontinent. Christopher Helm. ISBN 0-691-04910-6. 
  4. 4.0 4.1 Ali, Salim; Sidney Dillon Ripley (1986/2001). Handbook of the Birds of India and Pakistan, 2nd ed.,10 vols (2nd সম্পাদনা). Oxford University Press. Synopsis / Handbook Number 1012, vol. 10, p. 100-102. For Black-breasted Weaver behaviour and nest, quotes articles by Cooke (JBNHS v.60:1-48) and Ambedkar (JBNHS:69:268-82).