They are an invasive species where I live. They have been trying to establish themselves in my koi pond, and I have been discouraging them with a barbed fork. They will eat my baby koi and hummingbirds too, so they are not welcome. They have killed all the native chorus frogs on our land, and we love those little guys.

That makes them invasive but not in the traditional sense as in being introduced by man. Welcome to the effects of Climate change. Bull frogs in WA are 1400 miles north of what was their range 50 years ago. 1400 miles north in 50 years! That's quite a migration for a non migrating species. I had a similar conversation with a denier not long ago: https://www.democraticunderground.com/100218112984

So, your dilemma isn't how to get rid of them but how to adapt your landscape to them. They are there to stay.

They are edible though and quite tasty. If you're interested PM me and I'll tell you how to prepare them.

Part of the Reason they arrived so quickly is transportation - they hoped a ride as a pet before being released. Like those jumping carp.
You're right, I live in Washington state.

...all the way up to canada. i don't think climate change was a factor in their invasion of the western US....they were introduced most likely via the pet trade or people out west wanting to cultivate them as a food source.

i think your idea of promoting them as a food source is definitely a potential solution.

...the ecological impacts of invasive bull frogs on a California national forest some years ago. The student's permit required that all bull frogs handled in the field be killed after their data was gathered. They are a serious threat to western native amphibians. I've never heard of them taking hummingbirds, but it's not surprising. They'll eat just about anything they can swallow.

Film converts light to silver oxide crystals and then converts that to colored dye so there's no way it can be truly sharp. I don't miss film for a variety of reasons.

...is the fact that you have to project thru 3 layers of emulsion in the negative to print images as opposed to just 1 layer in slide film or black and white negatives.

and, yeah, i am on board with not looking back at film cameras.....i'm good with digital.

is that duck weed he's lurking in?