It's hard to find much "real life" info on them since they're a rare species, but I do see similarities in my male Griffin, to my Red Bellied parrot and other Poicephalus. Griffin is much more active, high strung, and overall not as easy going as my Red Bellied parrot.
Griffin is the absolute QUIETEST parrot I've ever heard. Both quiet in volume and how frequently. He makes the most adorable squeaky 'baby' noises I've ever heard. He says hi, and occasionally 'good boy' but only in the morning under his cover. He's not a talker like my other boys. He's also the "cutest" parrot I've ever had or seen lol.
U2-Poppy(Poppy lives with her new mommy, Misty now) CAG-Jack, YNA, Bingo, Budgie-Piper, Cockatiel-Sweet Pea Quakers-Harry, Sammy, Wilson ***Zeke (quaker) Twinkle (budgie) forever in our hearts