Our hummers arrive just as the lilacs are about ready to bloom. Tulips and daffys are still blooming in profusion. I knew that the hummers fed tiny insects to their babies, but hadn't thought of the protein needs of the adults. However, it does make sense that they would need a certain amount of protein. I hadn't seen a hummer since mid Sept, so last week I packed our feeders away for the winter. We didn't have many hummers this year, not sure why, but I'm guessing it was the weather. Anybody else in the west have an idea about that?