Any of the Corvid family are great. Super intelligent, and fun birds.
Scrub Jays are corvids. They're such terrible bullies they even bully crows despite being much smaller. Family cats and dogs and other animals are subject to attack. The eggs and babies of other birds, including other scrub jays, are subject to eating. And the conquer and claim backyard bird sanctuaries for the Hell's Birds Motorbeak Club. And from then on they are very territorial and aggressive, and they have this relentless and hideous screeching squeak. Especially when they are being territorial. They have one screech that sounds like some electric industrial scratching sound, and there's one around here who sounds like a bird version of Gollum wailing. Crows, by comparison, sound like the fine symphonies of Mozart. (this is all specific to the Western Scrub Jay)
But, the interesting thing about them is despite their extreme aggression towards even each other, they do work together. I've seen and heard examples of this. And if one finds another one dead, the one who found the dead one will let out of a cry to summon other scrub jays to a funeral that will last a day or two. (if a nuclear bomb is detonated here, that is what happened)
I wonder how that goes paying their respects? Sorry you're dead, man. Nothing personal when I invaded your home and gobbled your kids and traumatized your mate. Nature, dominance, less competition for my own kids and all. Rest in peace, bro."
But I have to admit, easily one of the most pretty and beautiful birds I've ever seen, if not the most beautiful. Truly, the pictures do not fully capture just how beautiful this bird really is. But it's equally horrendous to have around.