During the course of five years that began on 24 April 1834, he collected several new species of plants and animals including the Wynaad Laughingthrush which he collected on the slopes of the Nilgiris and was named by Thomas C. Jerdon as Garrulax delesserti in his honour.
The Black-chinned Laughingthrush (Trochalopteron cachinnans) is a species of Laughingthrush endemic to the high elevation areas of the Nilgiris and adjoining hill ranges in Peninsular India.
The species is named after Benjamin Delessert and was described on the basis of a specimen collected by Adolphe Delessert in the Nilgiris.
He was an educationalist and the founder of St George's Homes, an Orphanage-cum-School for abandoned and deprived children of Eurasians or Anglo-Indians in Kodaikanal, later renamed as The Laidlaw Memorial School, Ketti in the Nilgiris.
In 1941 he moved to the Nilgiris to take up a position as headmaster at St. George's School in Ketti; the school, which had been first recognized by the Education Department of Madras as a free primary school, was raised to the status of a high school in 1944 during his tenure.
It is situated on the foothills of Western Ghats near to Mukurthi National Park in Nilgiris district of Tamil Nadu.
The ghats of the Nilgiris lead to the plains of Malabar and Coimbatore.
In 1911 Census of India, E.A. Gait mentions polyandry of the Tibetans, Bhotias, Kanets of Kulu valley, people of state of Bashahr, Thakkars and Megs of Kashmir, Gonds of Central Provinces, Todas and Kurumbas of Nilgiris, Tolkolans of Malabar, Ishavans, Kaniyans and Kammalans of Cochin, Muduvas of Travancore and of Nairs.
Adolphe Delessert who discovered the species in the Nilgiris noted that it tended to be found along riverine forests and that it was hard to capture.
Sacred Heart Matriculation School (SHMS) is a matriculation institution in Gudalur, Nilgiris - Tamilnadu.
In November 2009, Minister of Environment and Forests, Jairam Ramesh, in a letter to Anil Kakodkar, Secretary, Department of Atomic Energy (India) (DAE) and Chairman, Atomic Energy Commission of India (AEC), denied permission for the Department of Atomic Energy to set up the India-based Neutrino Observatory (INO) project at Singara in Nilgiris, as it falls in the buffer zone of the Mudumalai Tiger Reserve (MTR).