• ABR in situated at the southern-most end of the Western Ghats and spread over two southern states Kerala and Tamil Nadu.
• It was established in 2001. It is named after Agastya Mala peak that rises up to almost 1868 metres above sea level, in Thiruvananthapuram, Kerala.
• In March 2016, it was included in the World Network of Biosphere Reserves of UNESCO.

Researchers have discovered new grass-like plant species named Fimbristylis agasthyamalaensis in Ponmudi hills within the Agasthyamala Biosphere Reserve in the Western Ghats biodiversity hotspot. It has been classified as sedge, the grass-like plant and has been named after the locality from which it was found.