Now, I'm looking for a beast that I can (preferably at this level already) Wild Shape into, which has a bonus action available. This would allow me to use my action to activate call lightning every round, and still do other stuff besides moving.
I'm aware of several beasts that have abilities such as Pounce. However, these usually require you to use your action for an attack, which defeats the purpose of this question.
Similarly, I know that I can stay in my regular druid form and cast healing word with my bonus action, or that I can use a bonus action while Wild Shaped to expend a spell slot for healing. Both are, however, situational, expensive and undesirable (unless you want to get yourself or your companions hurt).
Are there any beasts that are able to use a bonus action without spending their action in a specific way?