This is … a gathering of Macaws are apparently chatting while their custodian is having lunch at a local Boulanger. They are not tethered in any way, nor was their guardian anywhere in sight. He (or she) had gone into the restaurant for a bite … which is what would happen to any one brazen enough (and naive enough) to attempt to steal these glorious birds.
Those beaks can crush a Brazil nut with no problem. Just imagine what they would do to sticky fingers.
I note that the truck matches the color of their tail feathers. A bold fashion statement.
Then again, perhaps the birds didn’t arrive on the truck at all, but were flying over when they saw a rest stop whose color offered the appropriate camouflage. Yes, indeed. They blend right in.