isn't amazing that we all worked together for so long and had no idea of what each of us looks like, our ages, or any of that....? well, mostly we didn't!! or do i mean most of us didn't know that about each other...
slogan for the day: things may not be what they seem.
Guys, sorry for the wrong ID, this is H. sexmaculata, according to the expert at WWF Thailand.
Btw, I woulnd't say it is common to see them congregrate in this number as in the picture. However, I've seen Homaloptera hanging out together in small school of 3-5 many times, espeacially in a stream where preferred rock space is limited.