These are from a Whitman set that I got. It wasn't particularly cheap, but the coins seem mostly naturally RD toned, so I thought that was worth something. Here are some samples
It turns out that Wrens are an interesting songbird, with species on all continents except Antarctica. They all have those banded wings, but mostly they are rambunctious singers. They love the upturned tail feathers. My Canary is very stimulated by these sining videos
Those are some nice red coins. Bound to be a pretty old Whitman folder, too- long out of print, I would imagine? Hope you used some cloth or something when pushing the coins into the slots. I'd be nervous with that much red copper in a folder like that, and paranoid about fingerprints and other things. It's kind of interesting how the Irish Free State and Republic had the woodcock on the reverse of their farthings while the British had the wrens going. Both cent-sized coins circulating in the British Isles were birds. I have been thinking of making Wren farthings the host coins for my next elongated coin issue, perhaps. Those, or .500 silver sixpence, or .800 Canadian Schooner dimes, or silver Roosevelt dimes. Not sure which it'll be yet.
My mother's canary used to be particularly turned on by the in-sink garbage disposal in the kitchen, or the vacuum cleaner.