There was a lot of chatter from these guys, and while they are usually quite vocal, they are quite nervous when they see someone walking in their vicinity, these did not fly off.

On investigation, I noticed they were well up in a tree, all clustered around the fully flowering Cocos Palm, and obviously getting some nectar out of it. As it is breeding season, there were a lot of pairs getting a good feed to get them through the nesting and egg laying stage.