A Ba'ku kolibri
The Ba'ku kolibri is a type of bird native to the Ba'ku planet. The bird bears a strong resemblance to Earth's Hummingbird.
Captain Picard and Anij watched a kolibri fly in slow motion while experiencing the "perfect moment" in 2375. (Star Trek: Insurrection)
Background
From concept to featured effect
The Ba'ku kolibri seen in the Insurrection movie, was not in effect footage of a real world bird, but rather a full-fledged CGI effect constructed at Blue Sky/VIFX, they being responsible for the planet-bound visual effects for that movie. The animators at Blue Sky used high-speed photographs taken from real-world hummingbirds as reference for modeling the "slowed" flapping of wings. (Cinefex, issue 77, p. 79) Animation Supervisor Mark Baldo recounted, "When the hummingbird was moving in real time, the wings were just a blur, so Doug Dooley, who animated the hummingbird, was literally posing them into completely different positions from frame to frame. The hard part was doing the 'slow-motion' animation. In real time, the wings would beat completely in just a few frames, but in slow-motion, they would probably take about five seconds to go from the bottom-most position to the top. We were still only working at 24 fps, but it's the positioning of the wing in each frame that creates that illusion of a super-slow altered reality. In order to make the hummingbird a very iridescent creature, one of our senior technical directors, Dave Walvoord, wrote a special procedure. The hummingbird's feathers looked almost black, but whenever the light hit them, the feathers went green." (American Cinematographer, January 1999, p. 44-45)