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.
Yellow-throated Laughingthrush | Wynaad Laughingthrush | White-throated Laughingthrush | Laughingthrush | Grey Laughingthrush | Ashy-headed Laughingthrush |