Nah i didn't need that or legendary animals either
I did study one macaw on guarma like i said previously but i don't know if that changed anything, i would assume none of them are needed and the parakeet is part of a side quest or something i think to take them all out so that might be why it's not needed.
In theory if that pushed the counter forward (doing the guarma animals) wouldn't the people who did them have the study trophy 11 animals earlier than me or however many guarma animals there are? Instead of just everyone not needing the parakeet? Seems like it just isn't needed.
Could be wrong though.