To solve the problem, we need to identify the year in which Kolleru Lake was declared a Bird Sanctuary.
1. About Kolleru Lake:
Kolleru Lake, located in Andhra Pradesh, is one of the largest freshwater lakes in India. It is an important habitat for a wide variety of resident and migratory birds.
2. Declaration as Bird Sanctuary:
Kolleru Lake was officially declared a **Wildlife (Bird) Sanctuary** in the year **1999** under the **Wildlife Protection Act, 1972**, to protect its rich biodiversity and bird population.
Final Answer:
Kolleru Lake was declared a bird sanctuary in the year \( {1999} \).
A biologist surveyed islands of different sizes and consolidated the results in the form of the data given below. Study the data carefully and answer the questions that follow.
Based on data (Birds decline, Plants % decline, Area decline), interpret two reasons for change in the population of migratory birds. 