Black-chinned Fruit-Dove didn't face a major threat in the world , only distributed in the Philippines and Taiwan (are difficult to be found) . Records in Taiwan have been quite rare. If there were any resident populations in Taiwan, the number of ethnic groups should also be quite small Their body color is very similar to forest background , if they didn't sound or call , it is not easy to be found. Activities alone in the canopy. So far, there is not much understanding of t heir living habits. Dispute The Black-chinned Fruit-Dove's population on Taiwan's island has always been an unsolved problem Gibbs et al. (2001) and Dickinson (2003) consider this species has four subspecies, P. l. Taiwanus is only found on the island of Taiwan and is sub-endemic to Taiwan . ( their reason is : although the records is very rare in recent decades, but it shows included male, female & sub adult in different recorded ) But the other scholars believe that the individua...