Grassland specialist birds in a managed habitat of north‐east Bangladesh

Muntasir Akash, Tania Khan, Sayam U. Chowdhury

Abstract


A seven‐month spanned study from November, 2015 to May, 2016 was
carried out to investigate the status and fluctuation of grassland dependent birds
in a Saccharum‐Imperata patch locating in the northeastern Bangladesh under
ownership of a tea‐garden; applying line transects with direct observation and
diversity index. A total of 2586 individuals of 110 species was observed,
grassland specialists constituted 829 (32%) individuals from 39 (35%) species.
Only seven non‐passerine specialists were observed against 32 passerine
specialists whereas 19 being resident and 20 wintering species. Of the grassland
specialists, 31% turned out as few, 33% fairly common, 21% common and 15%
very common. Insectivores and seed‐eaters were dominant feeding guilds over
scavengers and omnivores at the site yielding nine categories. Specialists scored
the highest value in Shannon’s Index for November (H′sp.nov = 2.81) followed by a
steady decline throughout the study period. The largest winter congregation of
Yellow‐breasted Bunting and Common Rosefinch in Bangladesh was observed
and sighting of Black‐headed Bunting was the fourth national record. The site
was found to be supporting breeding population of Golden‐headed Cisticola so
far only known to country’s inventory. Despite once supporting about 10
extirpated avian species and still being diverse, adequate information on
grasslands is still wanting in Bangladesh.


Keywords


Grassland birds, Toxic grasses, Community ecology, Bird migration

Full Text:

PDF

Refbacks

  • There are currently no refbacks.


Dhaka University Journal of Biological Sciences ISSN 1021-2787 (Print) 2408-8501 (Online)