Hey guys, quick question. I bought my first frogs yesterday, 5 hyloxalus azureiventris. Within a few hours in my paludarium they started exploring and one even started calling! All except for one. This little guy is still sitting underneath the piece of corkwood in the middle of my paludarium. He came out for a quick run last night but he's back there again. Is this normal behavior for a frog that just moved in to a new home? And how long does it usually take for the frogs to feel safe and secure and become more bold? Thanks!

My tank: