Saw-whet wing feathers contain a pigment called porphyrin, which glows pink under UV light. New feathers glow more brightly than older feathers. Due to the owl’s molt pattern, they can be aged.

A UV light illuminates porphyrins in a saw-whet owl’s wing to help researchers determine the feathers’ age Tuesday, Oct. 15. (Avery Howe/Bigfork Eagle) ...

Autumn’s north winds, cold temperatures, and long dark nights are what northern saw-whet owl banders dream about. Like many other bird species, northern saw-whet owls begin their southern migration to ...

A northern saw-whet owl in Canada Education Images / Universal Images Group via Getty Images The birds weigh about as much as a bar of soap. That’s how Melissa Boyle Acuti describes the northern ...

Saw-whet wing feathers contain a pigment called porphyrin, which glows pink under UV light. New feathers glow more brightly than older feathers. Due to the owl’s molt pattern, they can be aged.

A northern saw-whet owl wing is held under a black light to help determine its age. The bird, the smallest species of owl in Wisconsin, was being measured, aged, banded and released.

Banding stations are revealing some of saw-whet owls' secrets. Banding stations are revealing some of saw-whet owls' secrets. Minneapolis. 24°F. eEdition. Minnesota News You Can Use. The Latest.

The northern saw-whet owl is the smallest owl species found in Wisconsin. Due to its reclusive, nocturnal habits, it's also little known and rarely seen. Licensed bird banders help track the birds.

Find Your Next Book Thrillers N.Y.C. Literary Guide Nonfiction Summer Preview Advertisement Supported by Nonfiction “What an Owl Knows,” by Jennifer Ackerman, is peppered with fascinating ...

The birds weigh about as much as a bar of soap. That’s how Melissa Boyle Acuti describes the northern saw-whet owl, the smallest owl species found in Maryland and one of the smallest in North ...

Early last October, I was fortunate enough to spend an evening, along with a few other birders, with John Fedak at his saw-whet owl banding station near the Kinzua Dam in the Allegheny National Forest ...

The northern saw-whet owl is the smallest owl species found in Wisconsin. Due to its reclusive, nocturnal habits, it's little known and rarely seen. Smith: Saw-whets, Wisconsin's smallest owl, are ...