When we see male and female ruby-throated hummingbirds perched next to each other on our feeders it is easy to assume that ruby-throated hummingbirds mate for life like many other birds that reside in our backyards. The truth of the matter is, however, they do not.
Females arrive in our yards each spring after the males. In addition, males migrate south before the females. Actually, they stay together for only a matter of days.
If that is not enough, male rubythroats do not even help build the nest or feed their young.