Green-crowned Brilliant

Thank you Ashish. It is actually quite large for a hummingbird: 12-13 cm. I should add more information!

Thanks Atul and Emma! You're very lucky to have hummingbirds in SF Emma. One of the great joys of walking in the forest of Costa Rica is that you would hear them first and then see them...

Thank you so much Jonathan! Yes, she is indeed very distinctive with the white strip under the eye amongst others. I will edit accordingly.