well it would appear that this mod interferes with the spawning of the ichthyornis, (the seagull but not the pelagornis the smaller one that steals your ♥♥♥♥ and throws it on the ground.) which is cool other than it makes it so you can't really effectivly tame the hesperonis. Our online server has zero of that bird and i tried it on single player and with the mod installed didn't find one of them but without it found dozens of them within minutes. So i dunno if this mod will get support for this issue or not but would be cool if it got fixed or whatever.