Let's talk about standing water in the rain gutters on your home again as, well gutter cleaning is what we do.
What's in the gutter? video
When gutters get clogged, they get backed up with rainwater and overflow. However, when the overflow has stopped, several inches of water can sit there stagnant for....well, until you call out the gutter cleaners or until the next rain stirs up the mix again.
Another cause for water accumulation in the gutter is improper pitch. The pitch could be off, because it was A- never installed properly in the first place -or- B- things have settled. Either way, it is a simple fix. After we clear out the debris, we look for issues with the pitch of gutter. Remember, you want gravity to help it flow to the downspout. Then you want the water to be directed roughly 10 feet from your home's foundation.
So what's swimming in the gutter and how did it get there? The explanation is probably pretty simple. I remember when we had a pond in the back yard growing up and there were all these different kinds of fish popping up that we did not put in it. We thought that birds might have carried the eggs from one body of water to another- makes sense to me. Just a guess though. Is it insects? Well they can crawl or fly and lay their eggs. Rob thought it would be funny (not sure how it would go over- that's why I'll give him credit for it) to say virus or odd mutation. Whatever it is, I say that unless you want your gutters on your home to turn into a science project, keep them clean and free flowing. Standing water is a breeding ground for all kinds of weirdness!