A worldwide community photographing and learning about wildlife
Panaeolus papilionaceus
Growing on old buffalo dung
Well I'm not exactly sure on what grows in Thailand, but P. papilionaceus is very widespread and common, so I wouldn't be surprised if it did. Although this could be another closely related Panaeolus species. As far as P. cyanescens go, you will likely know when you find them because the blue bruising is very intense. Happy Hunting :)
I did'nt touch them RandyL ........ cyanescens was listed as being in Thailand but not papilionaceus. I'm a complete novice when doing idents especially where many are similar.