Sexing my beardies

Question

My beard dragons sex. Have two one goes crazy bobbing head up and down and black beard. The other one is bigger but no bobbing and does have like a beard . We put them in together and the smaller one bites and hold big one down then big one just tries to get away. The one we know is a male which is smaller won't stop bobbin but other one just stares at other one through tank. Need help

Answer 1

A great way to sex your dragons is by passing a light through their tail, like this picture:

Head bobbing and puffing of the beard can be a dominance display or sexual, both situations can be harmful for your dragons so keep them separate at all times.