The early-arriving robins might find no food! Here's why: It’s so cold and snowy when they get to the mountains that earthworms haven’t yet come up to the soil surface. Wild berries and fruits have already been eaten by other winter birds. And the wildflowers aren’t yet blooming. This is a sign that other food sources will be late to bloom and bear fruit. Can the robins survive?

Temperature affects when wildflowers bloom.
Mike Blakeman, USDA Forest Service