Photographed by my son in Ecuador, South America
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:) Thanks for the identification
Defo a female Dobson fly - I've seen these huge insects often in Central and South America; the males are even more spectacular with huge sickle shaped mandible making the insect plus mandibles in some species a good 5 inches long... check this one from the USA http://carnivoraforum.com/topic/9673475/1/ Their huge fearsome looking larvae (Hellgrammites) are aquatic.
Nick Upton, naturalist and photographer.
Lat/Lng: -2.1, -78.0