I thought it was less about racial stereotypes, and more about this big recent push across multiple fields to not have people's names attached to things. Right now (or recently) it's about oviducts v Fallopian tubes or the bulbourethral gland v Cowperis gland in biology, which I'm familiar with. I think there was a post and comment thread about birds specifically in the last few days on Lemmy; same thing with people's names being removed.
From what I've seen, a lot of the motivation to not have peoples' names attached to things is because people have things attached to them (such as racism). Not saying that's every case, but I'm sure that's a significant factor behind the general push.
I mean the other names make sense with additional context
Both Tit- and Cock- as prefixes used to mean small (no laughing in the back, please)
And Hoary means grey-haired or old-looking
edit as I had to look this one up: "Booby" is an ellision of "Bobo" - as in "No seas tan bobo" (Spanish) - meaning "silly, naive, dumb..." as they tend to be quite tame birds
the overall impression or appearance of a bird garnered from such features as shape, posture, flying style or other habitual movements, size and colouration combined with voice, habitat and location.