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Assessment of native and migrant bird species in a riverine ecosystem of India

Author Affiliations

  • 1Department of Environmental Science, Bangalore University, Jnanabharathi Campus, Bengaluru-560056, India
  • 2Centre for Ecological Sciences, Indian Institute of Science, Bengaluru-560012, India

Int. Res. J. Environment Sci., Volume 8, Issue (4), Pages 21-27, October,22 (2019)

Abstract

The present study aims to classify the native and migrant bird species recorded during the summer season in Ranganathittu Bird Sanctuary of Karnataka State. Bird survey was conducted during the summer season in the month of March, April and May inside Ranganathittu Bird Sanctuary (RBS), located on the bank of river Cauvery. Readings were recorded on every weekend, during Saturday and Sunday of the summer season. The birds were recorded during morning from 06:00AM to09:00 AM, and at the evening from 04:00 PM to 06:00 PM using belt transect method. Birds were classified into native and migrant species based on direct observations. Although RBS is having a specific percentage of nested native bird species, there was almost a significant percentage of migrant bird species were recorded during the study. Total numbers of 2890 birds were recorded during the study which belongs to 84 different species and majority of them were native and relatively good percentage of migrant species were observed. More number of aquatic birds was recorded from the migrant bird species group. The study revealed that relatively good percentage of migratory bird species nests in RBS during summer season. Birds require explicit natural assets for generation and for different exercises for their survival. Among both transient and local or non-transitory species alike, satisfactory nourishment for the youthful has all the earmarks of being essential in figuring out where, just as when, a species will breed. Also, study shows that RBS is a preferred habitat for migratory birds during summer season.

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