In the summer of 2009, after an unusually-wet spring, ladybugs -- millions of them -- swarm a small Colorado mountain community, covering trees so thickly that the trees look as if they had red bark. Vanderveen, C. (Reporter). (2009, July 11). Millions of Ladybugs Swarm Colorado Mountain Town. Unidentified Woman: Lots of privacy. CHRIS VANDERVEEN reporting: Even in a neighborhood... Woman: We all kind of look out for each other. VANDERVEEN: ...where every neighbor keeps a close eye on any and all visitors... Woman: There's not a lot of traffic up here, so. VANDERVEEN: ...the four-year-olds were likely the first... JACK: Ladybug! VANDERVEEN: ...to spot them. JACK: There's one! Woman: It's just swarms of ladybugs. JACK: There's lots over here. Woman: We've been trying to convince Jack that they aren't all females. JACK: They're moving so fast I can't count them. VANDERVEEN: But because they're now impossible to ignore... Woman: It's a very unusual event. VANDERVEEN: ...the new residents have the old residents worried about what will happen once we take our camera to the top of their mountain. Woman: It'll be interesting to see what you find up there. VANDERVEEN: The higher you go, the more amazing this gets, they say. And it is tourist season, after all. JONATHAN: We can take swarms of ladybugs, I guess. But swarms of people would be a bit much. VANDERVEEN: So we told amateur photographer and full-time computer programmer Jonathan. JONATHAN: I guess they all got together for a big party. VANDERVEEN: We told him this: If we would agree not to disclose this location, would he agree to escort us to the peak? Our first stop was this house. JONATHAN: Every place that you look. LINAE: Where are we? VANDERVEEN: We're only using first names, because he and his wife, Linae... LINAE: I can feel one crawling up my leg inside my pants right now. VANDERVEEN: ...well, they both live up here as well. JONATHAN: I think there's one right here. VANDERVEEN: But this, this is still a couple hundred feet from the top. And as impressive as it certainly is, Jonathan and Linae said let's go on up. And a couple hundred feet later... JONATHAN: It's like New York City for ladybugs. VANDERVEEN: ...we came upon a tree that looks like it has red bark. Only thing is, that ain't red bark. JONATHAN: I don't know what this tree thinks of them. We saw one earlier mating. Maybe they're, you know, in the process of doing hard work. LINAE: It really is covered with ladybugs. VANDERVEEN: How many are here? Who knows. But supposedly they bring good luck. LINAE: If you kill a ladybug, it'll rain the next day. So just walking around up here, I think we're guaranteed some rain for quite a while to come. VANDERVEEN: Just please, remember this. JONATHAN: We appreciate, you know, peace and quiet. And I'm sure these ladybugs do, too. VANDERVEEN: Million or so visitors is about all this neighborhood can handle right now. JONATHAN: Adios. VANDERVEEN: For NBC News, Chris Vanderveen in Jefferson County, Colorado.

KUSA