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Showing posts with label finches. Show all posts
Showing posts with label finches. Show all posts

Friday, January 11, 2013

Snowy Redpolls


The cabin in Lake Shore has been inundated with winter finches: Pine Siskins, Pine Grosbeaks, goldfinches and both Hoary and Common Redpolls (no Evening Grosbeaks, yet!).

The redpolls may be my favorite winter visitors. They're just so gregarious and dapper looking. The ones in these images are the more often-seen Common Redpoll.

During a recent snowfall I had fun snapping these photos through the kitchen window while staying nice and cozy inside.



These beautiful birds are irruptive and in years like this travel in large flocks farther south than normal. While we periodically have them in the Twin Cities, this is only the third winter since I moved here in 2002 that we've had 80+ redpolls at our Afton feeders on a regular basis.

An irruptive winter is not only a thrilling one, but an expensive one (we're going through 40 lbs. of Nyjer a week!). Unfortunately these birds at the cabin aren't quite as lucky - they go days without seed waiting our return for long weekends.

Typically, these birds are found worldwide in the arctic and subarctic boreal forests. In North America, they venture into the Northern United States during the winter and as far south as the Central United States in irruption years.

Because I'm in the process of obtaining my banding license, the recovery of bands fascinates me. On the Cornell Lab site, they listed this cool fact about banded redpolls:

"A few banding records have shown that some Common Redpolls are incredibly wide ranging. Among them, a bird banded in Michigan was recovered in Siberia; others in Alaska have been recovered in the eastern U.S., and a redpoll banded in Belgium was found 2 years later in China."

That's amazing!

Another cool fact that I learned on the Cornell site? They burrow into the snow to stay warm overnight! They've found them in tunnels a foot long.

Want to learn more about these neat winter visitors? Check out Cornell's site.


Saturday, February 4, 2012

Frost and Finches



Last night's drop in temperature brought a gorgeous frosty morning here in the St. Croix Valley. Even the barbed wire is frosted. All the spikes face north on the frost, reflecting a northern wind as the frost was forming. The south side of everything is frost-free.



I thought this was hoarfrost, as rime ice typically only forms in moist areas, but after more research, I think it is actually rime ice as it formed in the foggy conditions last night while the temperature dropped. From what I understand, hoarfrost is formed without fog moisture and usually is more feathery instead of spiked. It's softness arises from condensation, whereas the spikes of rime ice come from deposition.

Would appreciate learning more from any of you who are familiar with the two processes!

I love the silhouette of the frost and finch: