Why do robins appear first in spring ?

First sign of spring, Robin's everywhere #spring #robin #birds #changingseasons

Robin Singing about the Incoming Spring

Is This the First Sign of Spring? American Robin #birds #birding

Look What Showed Up in Our Garden… Spring Is Here! 🌱

First Robin of SPRING! #nature

First Robin of Spring Rocking and Chirping #birds #robin #shorts

First sign of spring is robins flying

Robin Singing – A Sure Sign of Spring

First Robin Chick Hatched! 🐣 Mom & Dad Feeding Newborn