Hi guys... (Tree Frog burying itself)

[snoopfroggyfrog]

Hi everyone....
just a quick question why do tree frogs bury theirselves other than when sick? one of my blues this morning had buried him self head pocking out in the moss on the base of the tank... it looked very cute... but i thought this was a sigh of stress of illness?
out of all four of my new friends 2 of them are blue and they are so far the most active, one of them is a crocker and all of them have very healthly appetites as the 2 week has gone on they feed infront of me fine the blues more than the others, there nothing wrong with any of them that i can see no sighs of red leg or anything they seem happy little souls. so i was just wondering none of them have done this before.......
thanks in advance if you answer my question this is a brand new learning curve for me........

edit keep checking him but hes on the bottom of the tank still has been moving around thoughout day but still only on the bottom tho...