Sunshine Robin

Sunshine Robin by PK HyperFocal

Sunshine Robin by PK HyperFocal

PK captured this photo of an American robin soaking up the sun the other day. See more in their Feathers gallery on Flickr.

Much more about robins on Michigan in Pictures!

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Bring on the Spring!

Robin by Charles Bonham

Robin by Charles Bonham

I saw a robin yesterday & have decided that Spring would be a very good idea. Who’s with me?

I know this guy Charles caught at Kensington Metropark the other day is! Head over to Charles’s Flickr for more including a few more great bird shots!

More birds & more Spring on Michigan in Pictures.

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#TBT A Blue Like No Other: Why are robin eggs blue?

A Blue Like No Other by Jamie MacDonald

A Blue Like No Other by Jamie MacDonald

Here’s a Throwback Thursday from April of 2009 in honor of Spring, which I hear is still happening. The resource on the initial post is no longer online, so I dug up this post from The Spruce explaining why robin eggs are blue:

The color of an eggshell is determined by pigments deposited as the shell is formed in the shell gland. The shell gland is the avian equivalent of a mammal’s uterus and is near the end of the oviduct, just before the cloaca. The shell is formed just before the egg is laid.

The bile pigment biliverdin is responsible for blue tones in bird eggs. Depending on the concentration of the pigment, the coloration can range from bright, bold blue or blue-green to pale ice blue and every shade in between. Smaller eggs and those laid first in a brood are usually more intensely colored than larger eggs or those laid later in the nesting cycle.

In addition to coloring eggshells, biliverdin is also responsible for blue tones in moth and butterfly wings, and is the same pigment that makes bruises turn bluish-green.

Read on for more and see a bunch more awesome shots in Jamie’s Nature photo album.

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Perched Robin

Perched Robin

Perched Robin, photo by matt.swope

Top of the morning to you from Michigan’s state bird, the American robin!

View Matt’s photo background big and see more in his Northern Michigan slideshow.

More Michigan birds and more spring wallpaper on Michigan in Pictures.