Donald M. Jones / Rufous Hummingbird (Selasphorus rufus) female feeding on flower nectar, Montana

Tim Zurowski / Rufous Hummingbird (Selasphorus rufus) female feeding on flower nectar, British Columbia, Canada

Diane McAllister / Rufous hummingbird (Selasphorus rufus) drinking nectar from an Agastache bloom in a backyard in Reno. Nevada, USA, August

Donald M. Jones / Rufous Hummingbird (Selasphorus rufus) male sitting on willow branch, Troy, Montana

Tom Vezo / Rufous Hummingbird (Selasphorus rufus) male feeding at flower, Green Valley, Arizona

Tim Fitzharris / Rufous Hummingbird (Selasphorus rufus) juvenile feeding on flowers, New Mexico

Tim Fitzharris / Rufous Hummingbird (Selasphorus rufus) feeding on flowers, New Mexico

Tim Fitzharris / Rufous Hummingbird (Selasphorus rufus) feeding on the nectar of a Desert Figwort (Scrophularia desertorum), New Mexico

Tim Zurowski/ BIA / Rufous Hummingbird (Selasphorus rufus) female bathing, British Columbia, Canada

Tim Zurowski/ BIA / Rufous Hummingbird (Selasphorus rufus) male feeding on flower nectar, British Columbia, Canada

Floris van Breugel / Young Rufous hummingbird (Selasphorus rufus) visiting Agave flowers. Pasadena, California, USA, July.

Alan Murphy/ BIA / Rufous Hummingbird (Selasphorus rufus) male feeding on flower nectar, New Mexico