Which sanctuary is called an oasis of water birds?

Explanation

**Step-by-Step Solution:**

1. **Identify the Question**: The question asks for the name of a sanctuary that is referred to as an "oasis of water birds."

2. **Recall Relevant Information**: The sanctuary that is widely recognized as an oasis for water birds is Chilika Lake Bird Sanctuary.

3. **Describe Chilika Lake**:
- Chilika Lake is a brackish water lake, which means it has a mix of fresh and saltwater.
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