Photo: Zach Henschel

UPDATE 11:21 a.m.

Once again Castanet readers have come through to identify the mystery bug – sort of.

There is some debate about a large fly spotted on the Westside by Zach Henschel.

Some say it is a bot fly, while others are saying it is a giant black fly and some say it is a horsefly.

But the majority of readers believe the bug to be a bot fly, a critter that lays its eggs in a living host and is nuisance to horse owners.

According to Wikipedia, botflies, also known as warble flies, heel flies and gadflies, are a family of flies technically known as the Oestridae. Their larvae are internal parasites of mammals, some species growing in the host's flesh and others within the gut. 

Dermatobia hominis is the only species of botfly known to parasitize humans routinely, though other species of flies cause myiasis in humans.

Were there secret nuclear tests in the Okanagan that no one knows about?

Or is it just coincidence insanely large bugs are being spotted by local residents on a regular basis?

Last week, Okanagan resident Zach Henschel came across a humungous spider, but what he found this week would give that spider second thoughts about trapping.

Henschel sent Castanet a picture of what appears to be a very large fly.

Much like the spider, the fly is roughly the size of a toonie.

And once again, dear reader, we need your help to identify the monstrosity.

If you know what this thing is, send us an email so others will know as well.