An 'Apapane (Himatione sanguinea) ruffles its feathers on a non-native pine. I chose this photo over others I have because of how it stands out so brightly against the cloud and rain. This one did a neat little trick for another individual, who I assume was a female (it is breeding season for these birds, after all). It (he?) started from a high branch and then slowly hovered down in front of the female who was perched lower in the same tree, landed, and sang while ruffling his feathers. Pretty cool to watch.