Study of Avian fauna in various parts of West Bengal

Birds are important as bioindicators in ecosystem functioning in pollination , seed dispersal, and insect pest control. They are sensitive to environmental change though threatened by threats like habitat loss, fragmentation and degradation all over their range.
Study on wetgrassland , agricultural land , forest and marshland at various habitats of West Bengal proved that passerines are the most dominant species found in W.B, under the order passeriformes.
Passerine birds thus include more than half of the bird species, sometimes known as perching birds, due to the arrangement of their toes. They are also known as song birds.

鸟类作为生物指标，在生态系统功能中扮演着重要角色，尤其在授粉、种子传播以及害虫控制等方面。尽管受到栖息地丧失、破碎化以及退化等威胁，它们对环境变化的敏感性极高。对西孟加拉邦不同栖息地如湿地草原、农田、森林和沼泽地的调查研究证实，在雀形目中，鸣禽是W.B地区最优势的物种。鸣禽鸟类因此包含了超过一半的鸟类物种，有时亦称作停歇鸟，这一称谓源于其脚趾的排列方式。它们亦被称作鸣禽。