Archive: https://archive.today/O8MxB
From the post:
>The irridescent display feathers of Anna's hummingbird reflect red and ultraviolet light, giving them a hidden dimension of color that is not visible to humans. The main photo represents what birds might see. It's a combination of the ultraviolet and visible light images. Unlike Anna's hummingbird, the ruby throated hummingbird throat feathers do not reflect UV light. The presence or absence of UV reflectance might help hummingbirds recognize their own species.
Archive: https://archive.today/O8MxB
From the post:
>>The irridescent display feathers of Anna's hummingbird reflect red and ultraviolet light, giving them a hidden dimension of color that is not visible to humans. The main photo represents what birds might see. It's a combination of the ultraviolet and visible light images. Unlike Anna's hummingbird, the ruby throated hummingbird throat feathers do not reflect UV light. The presence or absence of UV reflectance might help hummingbirds recognize their own species.
