A new study details the evolutionary change of Anna's Hummingbirds, finding their beaks have grown longer and more tapered to ...

With plenty of artificial nectar available, Anna’s hummingbirds have expanded their range northward and their beaks have ...

Birds are susceptible to many health conditions, from vitamin deficiencies to respiratory infections. Yet, scissor beak is ...

They also studied museum specimens of Anna's Hummingbirds dating back to the 1800s — well before the popular outdoor bird feeders existed — providing a range of beaks to measure over about 10 ...