Yes, Jason nailed the big fat one. May seem more than a mouthful for a bird, but fortunately, these guys are impalatable to birds cos of the toxins ingested from their host plant. They're quite safe from winged predators.
However, they're not so lucky when it comes to the Changeable Lizards and Kerengga ants. I've seen these fire ants polish off a poor cat at AH recently. :cry: