Expandable nests, how cool is that! Only 2 eggs. Courtship displays are so elaborate & expend so much energy with repetitions. After all that work, they maybe mate & then they’re done! No further involvement. Altitude migration of Hillstar & torporing down to 38° F is unique.
I will never forget the first time I saw a hummingbird. I was in my 40s and visiting family in the suburbs of Philadelphia. Suddenly, what I thought was a large insect went lightning fast zig-zagging across their property. I was overcome with joy as I realized that’s not an insect, that’s a hummingbird! THAT’S A HUMMINGBIRD!