well Birdosaurs are not a mutated dino in this real life serie of mine there just natural evolved dinos.dont be fooled by there cute look and colors they are only sweet beetween them.and worst the yoshisaurus and birdosaur are two modern dinosaur predator that never gets along so will make your journey more at risk of confronting them.the Birdos are only meet eaters.the birdos as one way of defending them self very unique they have longer skin that covers there mouth with it they tent to grab rocks on the ground and with the preshure the pouf them out at you!...it is only a local legend the birdos atch there eggs from there mouth. infact they ley eggs like any other dinos.it came from villager who sais he ad saw a birdo do it.but with modern ppl they wer able to proove that it must of been left with no rocks near it and grabed a dead unborn baby egg that would never atch and grab it and pouf it on the villager.they hearn the nickname EggSpitters.the birdos do not obey king koopa bowser and naturaly they tend to submite to you if you win a attack and leave you alone.but some may be captured by bowser to be used as predetoriest dinos to attack with more rage...but there mostly not a worry compare to more creatures to come.