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 \( {1999} \).
Answer the following questions: