Rostrodon and Juvenile

A rather strange bird-like creature, that resembles small bird-like dinosaurs that exsisted millions of years ago. Though unlike birds and dinosaurs, it had mammalian traits because of this scientists are even more interested, especially in the possiblity that this creature may be the decendent of a missing link in evolution. Even more curious was the second set of mandibles located in it's throat pouch. It is fairly tame towards people, especially when presented with fruits and nuts, making fairly easy to study. However once it has reached the age of 1 year, it's behaviour begins to change. It becomes more aggressive and starts ripping of it's own feathers, likely due to the painful process it is going through. It was found that this creature undergoes a rapid, but violent growth spurt, that lasts approximately one week. The bone and muscle structures in it's body begins to progressively change into that of a mammalian predator. Once this transformation was complete the creature appearance is completely different, as if it has changed into a completely different species, one that is extremely aggressive and much more dangerous. It is advised that studies of this creature are to be abandoned, if you encounter this creature in it's mature form...run like hell!!