Hello guys ! 
I just stumbled on this thread as I was looking to implement birds in my project ! I think it is really great.
However, I don’t know if it’s me or if it’s a problem of compatibility with the most recent version of UE but the birds are not staying in the AI box. Moreover, it seems that the “proximity” check box is not working on my side.
I tried to migrate the “ABK flying birds” folder from the initial project to mine. Did I miss a step ?
Thank you in advance !
Have a great day