Sparkler Bees

Yes, there are critters in the atmosphere. Yes, I put them there. Deal with it.

— Ruby Gray

Assistant's note: They're not actually bees. They're not even insects.
To make a long story short, there was a significant hole in the atmosphere of our fair planet at one point. Not my fault, by the way. But, luckily for all the people who lived right under that hole, I decided to fix it anyway. I tried satellites first, but governments are so whiny about things floating in space that they can't control. So after the initial damage was fixed, I repurposed the satellites (Goodbye, secret SIVIC listening post on the moon), and came up with a more permanent solution.
Generally speaking, the organism I decided to call sparkler bees is constructed from the assorted DNA of three types of fish, an alleycat I found behind a local Target, the eastern bluebird, and a hint of naked mole rat.
A/n: They look spectacular. Somehow they retain the coloring of the bluebird, rendering them this spectacular blue. Add to that a hint of the cat fur which is just enough to give it a fluffy halo in the sun. The wings are feathered and light, but I'm not sure if these are precisely birds, since I'm fairly sure they give birth to live young. They are tiny, about as small as a calliope hummingbird. Something about their composition makes them sparkle.
They live in the stratosphere, only occasionally coming down to land like mammals in the ocean, and then only to breathe and mate. They primarily consume gas byproducts of various industry, and use a particular hive intelligence they are imbued with to effect repairs on atmospheric holes with their waste byproducts. It's slower than the satellites, but ultimately more self sustaining, and almost entirely rocket-proof.
For anyone claiming animal abuse, I assure you that the sparkler bees prefer living in the upper atmosphere where their only predator is the occasional spacebound traveler who didn't realize they were there.