Refer to the following sentence from the passage - "Birdwatchers and nature enthusiasts have been flocking to the island in hopes of catching a glimpse of this elusive and captivating creature." From this sentence, it can be inferred that the discovery of the new bird species sparked global interest in birdwatching as many nature enthusiasts flocked to the island the catch the glimpses of the bird.
Hence, option (c) is the answer.
Nothing in the passage suggests that the new bird species is aggressive. The scientific community rather had more interest as suggested from the following sentence of the passage - "By unravelling its migratory routes and stopover locations, scientists hope to gain insight into the challenges the Sapphire-winged Warbler faces during its arduous travels."
The passage mentions that conservation efforts are focused on this exquisite species, but it does not imply that they are solely focused on this species.