I was playing in Brisban Wildlands just a few minutes ago and found a “Juvenile Pink Moa”. This moa had its name in white, was not tamable (I presume; I couldn’t test, because I was on my Ele, and it was also white-named), and did nothing when attacked. I killed it after a short battle. It seems like this is a Juvenile Pink Moa that was meant to be tamable, but is only currently functioning as a high-health critter. (Note, though, that when killed the Moa does not add to the Indiscriminate Slayer achievement counter).