Lady bugs unite! When a friend of mine posted some photos she took while on a hike on Boulder's Green Mountain, I couldn't believe my eyes. I saw entire tree trunks covered in red. The red was lady bugs, a mass gathering of a gardener's best friend, as they search for mates and prepare to hibernate for the winter. Now this was something I had to see for myself.

Of course, not everyone can make the hike to Green Mountain, but hopefully you can live a little vicariously through this slide show, and learn a little something new about this "cuter" member of bug-dom.

There are more than 400 species of lady bugs, (or as they're more officially known ladybird beetles), in North America. This year has been an unusual one for lots of natural phenomena in Colorado -- a wet, cool summer has led to an endless green summer and multitudes of wildflowers -- and this year's lady bug gathering is no exception. Boulder Open Space and Mountain Parks estimates that this could be a record-setting year for the annual swarm.

Besides the slideshow, I've made a little list of interesting lady bug facts you might not know.

• They're cannibals.

o at least during their larval stage. Researchers recently discovered lady bug babies hatch and eat their siblings. Don't get too disillusioned. They grow out of it.

• They don't change their spots.

o Some people think you can tell the beetle's age by the number of its spots, but according to the Boulder Open Space and Mountain Parks, you keep what you're born with when it comes to the dots.

• They "play dead."

o If an adult ladybug feels threatened it will fall down and "die," or let off a foul yellow ooze from its leg joints that most animals won't want to eat, (University of Arizona)