- The bird survey conducted at the Silent Valley National Park in December 2022, 17 new bird species have been added to the existing list.
- So far, 175 species of birds have been spotted in Silent Valley.
- The survey was held in the last week of December 2022, to mark the 30th anniversary of the first bird survey in Silent Valley.
- The first survey was held in the last week of December 1990.
- The survey was held in association with the Kerala Natural History Society.
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