When we recently admitted a young Northern saw-whet owl, we broke out the black light to take a quick look at its feathers under ultraviolet (UV) light. The pink glow can help us confirm an owl’s age. Because this bird is in its first year of life, all of its wing flight feathers are glowing pink. The glow comes from proteins in new feathers called porphyrins. Under UV light, these porphyrins are fluorescent and visible to the human eye. As feathers age, these pigments break down, and the pink c
0:17
When we recently admitted a young Northern saw-whet owl, we broke out the black light to take a quick look at its feathers under ultraviolet (UV) light. The pink glow can help us confirm an owl’s age. Because this bird is in its first year of life, all of its wing flight feathers are glowing pink. The glow comes from proteins in new feathers called porphyrins. Under UV light, these porphyrins are fluorescent and visible to the human eye. As feathers age, these pigments break down, and the pink c
5.6K viewsJun 26, 2025
FacebookThe Raptor Center
A reminder of the glowing light that can come from looking at things a little differently. Under a blacklight, juvenile owls’ flight feathers can be seen glowing with beautiful pinks under the blue glow of a blacklight. This is an effect they lose once they molt their juvenile feathers and their adult ones grow in. The glow comes from proteins in new feathers called porphyrins. Under UV light, these porphyrins are fluorescent and visible to the human eye. There is no definitive answer as to the
0:36
A reminder of the glowing light that can come from looking at things a little differently. Under a blacklight, juvenile owls’ flight feathers can be seen glowing with beautiful pinks under the blue glow of a blacklight. This is an effect they lose once they molt their juvenile feathers and their adult ones grow in. The glow comes from proteins in new feathers called porphyrins. Under UV light, these porphyrins are fluorescent and visible to the human eye. There is no definitive answer as to the
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FacebookThe Raptor Center
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