I have to move my tarantula spiderling but it blends with the moss and now I can't find it!?

I need to move my Brachypelma Smithi (mexican red knee) spiderling to a smaller tank (it's in a 10 gallon OMG!) but it blends in so well with the moss I can't find it! It is only .75 inches long- anybody have a tip on how to find it?