When does migration bring new birds to Colorado? I’ve been pondering that question ever since I started birding. As a gardener with years of experience, I know when to plant each crop or flower. I know that 70° afternoons can be followed by 3° nights. Yes, April is like that—don’t be fooled.
But migration varies from species to species, and even sometimes from year to year. Instead of learning when to set out a dozen veggie varieties, I have to become familiar with the timing of hundreds of birds. For the most part, that’s still a huge mystery to me.