Call behavior action is a call action that invokes a behavior directly rather than invoking an operation that invokes the behavior.
It is shown as action with the name of the behavior that is performed by the action or description of the behavior placed inside the action’s round-cornered rectangle. If the node name is different than the behavior name, then it appears in the symbol instead.
Note, that because it looks exactly the same way as the common action, there is no way just looking at the diagram to say whether the name is common action name, call behavior action name or some behavior name.