…at home for Holidays…

…finds songbirds a nuisance.

Now you can follow Three Star Owl, me, and Cranky Owlet on Facebook.  Just click on the Facebook icon to the right, and friend “Cranky Owlet”.  Or, if you’re not already on Facebook, join to friend Cranky Owlet.

Cranky Owlet says, “Friend me!”

…crankiness to an artform.

There’s a property of owls I call “Half-Dome Head.”  It’s a shape that’s noticeable in the profile of all owls, particularly the larger ones.  The Barred Owl to the right is exhibiting major Half-Dome Head.  If Half-Dome Head can be achieved when making owls in clay, the resulting effigies will be Especially Owly.

The name derives from the famous granitic dome formation, Half Dome, in Yosemite Valley, California, which bears an obvious resemblance to an owl’s head in profile.  The geologic Half Dome is forming largely by weathering: eons of sheet-exfoliation on the fragmented face of an exposed granodioritic batholith gave it the shape we see today.  (Appropriately, one of the most Half-Dome-Headed owls ever, the regal Great Gray Owl, is an uncommon resident of Yosemite Valley, see photo below: the color and texture even match).

In owls, the “Half-Dome Head” effect arises from the front of the Owl’s head (in other words its face, to use the technical term) being shaped like a radar dish, to be efficient at gathering sensory input — in other words, light and sound.  But take away the feathers and an owl’s cranium is shaped pretty much like a hawk’s, or even a chicken’s skull (check out these images).  An owl is after all a bird, albeit a fairly specialized one, so it’s built like a bird.  The forward-oriented flat face that we humans find so fascinating (probably for anthropocentric reasons) is due more to posture and feather-arrangement than underlying skeletal structure: the owl generally holds its bill slightly downward rather than forward like other birds.  This gives prominence to the distinctive “facial disc” — the specialized array of radar-dish-like plumage around an owl’s eyes and ears — and positions it so it functions optimally.

The owl’s Facial Disc is a precise specialization for nocturnal hunters who require every available bit of light and sound directed into their sensory apparatus to ensure the highest possible success rate while hunting.  Several features of the facial disc are noticeable: short flat-lying feathers sweep away from the eyes and “cheeks” so as not to impede forward vision; stiff vertically-arranged feathers edging the facial disc help funnel sound into the ear openings, which are asymetrically arranged on either side of the face behind the eye to create aural parallax (and are nowhere near the cranial tufts we commonly call “ears”); and rictal bristles (“whiskers”), which are specialized sensitive filamental feathers on either side of the gape (the flexible corners of the mouth which allow the beak to open and close), that enable the owl to perform preening and feeding activities — including the feeding of owlets — by feel, since their large eyes are immovable in the skull and so can’t focus efficiently at very close ranges.

But that’s just the flat front of the “Half-Dome”: the round back, the helmet-shaped fullness of feathers on the back of an owl’s head also transmits owliness to our perception.  This is also due to the owl’s skeletal configuration: the bird’s upright posture is possible because its skull is joined to a nearly vertical spine.  Most birds’ backs go off at a more or less right angle to their necks (think of a dove), somewhat shortening the curve at the back of the head.  But the feathers on the back of an owl’s head arc smoothly down to the back, which continues downward steeply.  The photo above shows Half-Dome head creating Owliness in an MLO (Moderately Large Owl) I’m currently working on for a client.

Photos: from top to bottom: IBO barred owl, A.Shock; Half Dome Yosemite, Carroll Ann Hodges, USGS; Great Gray owl, Canada (Sorry; don’t know who to credit this photo to); Three Star Owl “eared” owl effigy in progress, A.Shock.  And finally, a Gratuitous Cranky Owlet chillin’ with the Big Boys…

…a true kindred spirit:

Adult Burrowing owl giving the entire world StinkEye at the Adobe Mountain Wildlife Center display at Boyce Thompson Arboretum’s “Welcome Back Buzzards Day”. (Photo A.Shock)

…peevish thoughts.

Great news!  Sharon Stiteler of Birdchick.com fame ran a contest for guest-bloggers while she’s out of the country, and Three Star Owl is her selection for Friday’s guest post!  Regular Three Star Owl readers will recognize the entry as a post from this web journal, Vertical Napping Bark, which is one of my favorites because of the lucky shot of the Great horned owl with downy chick in a snag, demonstrating the beauty of Owly Invisibility very well.

[The image to the right is a digitally-altered photo of the breast feather vermiculation (= Latin for "wormy pattern") that makes Great horned owls so invisible.]

If you’ve found your way to Three Star Owl from the Birdchick site, Welcome (Cranky Owlet says Hmph!), and take a look around: there’s lots of birdy art in the Gallery and Shop, and posts at the Journal on a variety of topics like birds, clay art, natural history and more!  Make yourself at home, and come back any time.

Thanks, Sharon, and have a great time in Guatemala!

Oh, and in my excitement, I forgot to mention that Swarovski Optik, makers of excellent binox and scopes, and beeooteeful crystal, is helping Sharon sponsor the contest.

…to describe his devotion to vole

(for lunch)

Happy Valentine’s Day!!

VOLE = LOVE

…that migration is quite the thing.