Sri Lankan Moon Moth (Actias selene taprobanis)

Location - Ilukkumbura

Host plants - Lannea coromandelica, Terminaliacatappa, Terminalia arjuna, Annona muricata

Wingspan - 12 - 16 cm

References - 

• Jayawardana, N.C. (2020) A Handbook to the Moths of Sri Lanka Vol. 01
• https://www.inaturalist.org/taxa/68366-Actias-selene
• Aluthwattha S.T., (2013) Family Saturniidae (Insecta: Lepidoptera) of Sri Lanka: An overview. Lepcey - The Journal of Tropical Asian Entomology 02 (1): 01– 11

Brown-Banded Hunter Hawkmoth (Theretra silhetensis)

Location - Polgasowita.

Reference - The Lepidoptera of Ceylon - F. Moore, F.Z.S. Vol 2 Thretra nessus of Page 22 & Plate 85?

External links -  http://www.inaturalist.org/observations/1803331

Oleander Hawk Moth (Daphnis nerii)

Location - Kotte.

Wing expanse - 8 - 10 cm

Reference - The Lepidoptera of Ceylon - F. Moore, F.Z.S. Vol 2 Page 14-15.

External links -  http://www.inaturalist.org/taxa/51996-Daphnis-nerii
Larval host plants - "Feeds on Oleander (Nerium oleander ) and Cinchona" - Moore, F.Z.S., 1882-3, Desert rose (Adenium obesum) & වතු-සුද්ද/Sri Lanka Jasmine/Grape-Jasmine/Wathu-Sudhdha (Tabernaemontana divaricata) - (Sujeeva Gunasena, Personal communication )

Atlas Moth (Attacus taprobanis)

A large moth lives in Southern India and Sri Lanka. Adult moths do not take foods and survive on fat they have stored from the larval period. The females sitting most calm and emit pheromones, that the active males can notice from a distance. As per Moore at that time Attacus taprobanis was a common insect in the Colombo. Probably due to readily availability of its host plant Cinnamon in the cultivation. 

Location - Ambagaspitiya, Gampaha district.

Wing expanse - 17 - 23 cm

Reference - The Lepidoptera of Ceylon - F. Moore, F.Z.S. Vol 2 Page 124-125.

External links -  http://www.inaturalist.org/listed_taxa/3412320
Larval host plants - "Feeds on Cinnomon and others trees (Thwaites)" - Moore, F.Z.S., 1882-3
                                     Elaeocarpus serratus (වෙරළු/Wild Olive) - (Rohana Gunawardana Personal communication )