hello. my E. boulengery died for not known reason. i had 4 E. boulengeri, i checked them in the afternoon and they were activ and healthy. after 1 hour i looked into the vivarium and I have discovered 1 dead frog (laying on its back) - well I picked the frog, 'she' was still alive, sitting on my hand, I put 'her' into the different vivarium and in the morning 'she' was dead. others are healthy (male is calling females). some d. vittatuses died like this 1 mount before... whats going on? please help!