These creatures cant apparently be picked up by anything, can't be affected by bolas , and they can only fit through dinosaur gates so i expect that they might be quite big. They can also ‘sense’ prey / dinos that is injured for you (if tamed.) If its a wild Fjordhawk and you are quite injured, it will attack you if it think it will be able to kill you, unless you have strong armour. They will also eat /scavenge Injured or Dead dinos. They also will retrieve your items when you die, not all of your items tho. But it will retrieve as much as it can carry (when tamed.) I hope this helped you understand better about the Fjordhawk before its released. :)