User blog comment:John Alfred Hammond, CEO/Civilized Talk on the Pointers to JP:TG as Canon/@comment-17754282-20141128002634

@ Wikia Contributor - please think about your answers before giving them. With regards to your arguments against the Pteranodons 1) who in their right mind would place a flying creature of any kind into an aviary that hasn't been completely constructed, let alone gigantic, aggressive flying creatures?  2) Where did you get the idea that the Pteranodons in JPIII didn't leave their enclosure because of their young? Within a day of the group encountering the Pteranodons and not shutting the gate properly the adults were seen flying off over the ocean, abandoning their young in the process (and yes, a good number of those young were still alive even after Eric fought them off.) - First chance they got the adults were gone, once they realised the gate was open, of course.

Also if the map was just a "fanservice" as you say then they should have left everything as it was to ensure continuity and then added their stuff to other places.