As you might've guessed, the sword-billed hummingbird is a type of hummingbird. It has a very, very, very long bill (compared to its body, which is tiny) that lets it reach nectar of flowers that are off-limits to basically all other birds in the world.
It's the only bird in the world that can lay claim to its bill being longer than the rest of its body.
It lives in the forests of the Andes in South America.
Ensifera ensifera.
To make a long story short, not much except for the fact that it stuck out in my mind.
(Well, okay, here's the long story: initially the site/project/whatever was going to be called "Wrath of the X", X being an interesting or bizarre-sounding [and better yet, implausibly wrathful] animal. So I looked through the index of a book on zoology, and, quite naturally, the sword-billed hummingbird stuck out as a tremendously appropriate candidate. It had the combination of sounding, in a roundabout way, mildly threatening: sword-billed; yet of also being so obviously non-threatening as to make the title, "wrath of the sword-billed hummingbird," something not entirely serious. At any rate, the project was an environmental one, with the idea of the mascot animal "responding" to humans' abuse of the environment. This project of using the sword-billed hummingbird as a way of communicating this sentiment fell more or less by the wayside, subsumed by other projects. But the name stuck. And that's how it came to be.)
Hummingbirds.net has all sorts of good stuff on hummingbirds and is a great place to start.