 Butler died on 29 December 1939 at age 66.The scientific name of the Nicobar sparrowhawk ("Accipiter butleri") commemorates Butler, as do the names of four species of reptile ("Gehyra butleri", "Lycodon butleri", "Chilorhinophis butleri", and "Tytthoscincus butleri") and an amphibian ("Microhyla butleri").