So this guy is super cool he will get you fish and then bring it back to you without you having to attack the fish! I have 2 of them (one named razorbeak the other stork) Stork is like my little baby so i send RazorBeak to go fishing for me. To get them to hunt for you just take them off follow put them on hunt and retrieve then on aggressive... They usually won't attack anything other then a fish or dodo when you do this.. I get prime fish meat all the time now so no more hunting for me!!!
When set to "Hunt & Retrieve" it will bring you dodos or fish and the dodos will give raw prime or a few of it. And fish will give raw prime fish meat. You'll know cause the corpse will glow yellow as the icthyornis is bringing it to you!