The bird is a direct lineage from the prehistoric Dodo bird. The strategic point in declaring the island and its species as endangered is that it allows the gormint to enforce special laws lock it down from the rest of the world and shields it from our secular laws. Hence one can't hunt there, nor can they convert the adivasis. Net net, it's a good move to keep harping on the rare nature of the birds and flowers there. It's not costing us any money. It's not like the gormint is taking care of these birds. It's just saying that they are rare so no visitors allowed. (But our Navy has its telemetry and ELINT stations there, if one reads between the lines). If it becomes a tourist spot then it will become a den of missionaries and tourists and spies and your ELINT stations will be in range of saboteurs posing as tourists.