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unwavering posted on r/denvergardener1w
I got the API Heated Bird Bath last year with railing mounts, which I think is the same one that WBU carries in-house. It was expensive but I've been happy with the number of birds (and squirrels) that use it year-round. I've seen a lot of new species since putting it up including lesser goldfinches and pygmy nuthatches https://www.amazon.com/dp/B0006HRQN6?ref_=pe_125775000_1044873430_t_fed_asin_title&th=1 The shallow design is better for birds but I do still refill it 2-3x per week (in the shade) to keep water topped off and clean.