Background: It’s finally starting to feel like spring outside. The temperatures are warming, there are patches of grass peeking through the snow, and we’re beginning to see birds migrating north for the summer. Among those birds is the tiny Ruby-throated Hummingbird. Weighing in at only 2 to 6 grams, it migrates from southern Mexico, across the Gulf of Mexico, to its summer home as far north as southern Canada each spring and back again each fall. The graph is line graph showing the number of adult male and female Ruby-throated Hummingbirds captured each day by a group in Quebec, Canada in 2007 between May 6th and August 27th. On days where zero birds were caught, either there were no birds out that day or it was too windy or rainy to catch birds safely.

Data Source: