I recall reading an interesting breakdown of aggro, but can't find the post atm.

What's the deal with bosses aggro'ing birds in AO3?
I've been spamming speed runs to lvl these last few days in Crush the Keeper, and noticed that regardless of the player the "boss" aggroes first (be it bear or mage), he shifts to bird almost instantaneously (regardless of taunting).

My build is a pure dex bird, lvl 50 atm. I have noticed this tendency regardless of the bird's level.
I also don't know if that would also happen with a dex bear or mage (anyone interesting in testing that hypothesis?).

Here's the probabilities of boss aggro'ing me:
Keeper (ALWAYS) > Mynas > Lore


Any insight?