hello! I recently rescued a bird (~1 year old female budgie) who is very aggressive. I’ve worked with birds before snd never seen anything like this. She doesn’t seem to be displaying any sort of fear, just aggression. She will literally chase my hand back and forth when it’s outside the cage to try to bite it through the bars. Do you have any advice on how to remedy this? She is molting, which could be contributing, but I’ve honestly never seen anything like this.
first would be a vet check, severe aggression can arise if an animal is in pain, I'd want to rule that out first before all else.
Aggression is a symptom of something else, usually it's fear-based even if you aren't seeing typical fear body language. Lots of birds have their boundaries pushed for so long that they just stop presenting the warning cues since they never work to make people stop and that's where you'll get cases where the bird will just jump straight to aggression to get their desired result. You may also be seeing aggression because they're stressed out, territorial, hormonal, or a variety of other reasons.
While we can't always know why the behaviour is occurring we can work with what we see in the moment. You approach the cage, they present aggressive behaviour to make you leave.
The Antecedent is you approaching, the Behaviour is lunging, the Consequence is you back away.
You can arrange yourself to work under the bird's threshold and reshape the sequence. Find the distance away you can be that doesn't trigger aggression and reinforce that calmness with whatever they find reinforcing. This can mean approaching the cage, clicking for calm, and then walking away if you leaving is what they want.
Now the Antecedent is you approaching, the Behaviour is soft body language, and the Consequence is you leave. They still earn the goal they wanted without needing to aggress to do so, calm body language should become more frequent.
Over time you can work closer and closer until you're able to add your hands in to the equation and eventually be able to drop a treat in the cage and walk away and start making the switch from negative reinforcement (you walking away) to positive reinforcement (treats being given).












