Kaeng Krachan, Thailand. February 28th, 2016.
This small microhylid was found while walking stream beds at night in Kaeng Krachan National Park. Interestingly, this frog was found with another microhylid species, Microhyla butleri. Each is marked differently, and M. heymonsi is rather short and squat in comparison to M. butleri, which has a more elongated body shape.
My Thailand Flickr album is here.
HerpMapper records for this species are here.