Three Hummingbird Species Are San Diego Residents and can be spotted regularly: Anna’s, Black-chinned, and Costa’s hummingbird. Costa’s Hummingbirds arrive at the Anza–Borrego Desert in December and ...

Spring is the time to nest for the Costa’s hummingbirds, before the desert gets too hot. Both males and females are looking for a partner, but it’s up to him to impress her. Though his back shimmers ...

In the world of Costa's hummingbirds, it's not size that matters—it's sound. During breeding season, male Costa's perform a high-speed dive during which they "sing" to potential mates using their tail ...

Heading south for the winter can be difficult and dangerous, especially when you’re tiny. Sometimes, hitching a ride is the safest way to go. A wayward Costa's hummingbird that was saved from frigid ...

RIVERSIDE, Calif.-- In the world of Costa's hummingbirds, it's not size that matters--it's sound. During breeding season, male Costa's perform a high-speed dive during which they "sing" to potential ...

In early spring, people walking through the deserts of California might be able to hear a high-pitched whistle. That noise comes from a male Costa’s hummingbird, but not from his throat—it’s all in ...

Learn about the Hummingbird Project and hummingbirds as they fly to Costa Rica and back Bill Hilton, Jr., Operation Rubythroat The principal investigator for Operation Rubythroat, Bill Hilton, Jr., ...

Male Costa's hummingbirds perform a high-speed dive during which they 'sing' to potential mates using their tail feathers. Males perform their dives to the side, rather than in front of females. UC ...