Category Archives: Weather & Sky

Deep Freeze

Snow in January (photo by Dianne Machesney)
My gosh it’s cold! 

Friday morning it was 6o F.  Yesterday morning it was 12o.  This morning it’s back down to 7o

Not only is it cold but we’re missing the deep snow cover that provides insulation for plant roots and ground-dwellers.  The mid-January thaw and subsequent freeze will be very hard on the plants and animals living at the northern edge of their hardiness zone.  The good news is that it’s also hard on bugs, so maybe we’ll have fewer pests next spring.

When will it get warmer?  The weather forecast says it’ll be 37o on Thursday. 

In and out of the deep freeze again.

(photo by Dianne Machesney, taken before the mid-January thaw)

How Are The Wrens Doing?

Shelter chosen by Carolina wren (photo by Marcy Cunkelman)That’s the question a lot of PABIRDers asked when the weather broke in mid-January.

True to their name, Carolina wrens are primarily southeastern birds who’ve expanded their range northward over the years. They’re resident now as far north as Ontario but are so sensitive to the cold that their populations plummet in harsh weather.

Pennsylvania birding data shows that Carolina wrens died back in the harsh winters of 1918, 1932-34, 1958, 1977 and 1994.  Earlier this month we had two very cold, snowy weeks with lows in the single digits and at least three inches of continuous snow cover.  Have the Carolina wrens survived?

Marcy Cunkelman’s have.  A pair of Carolina wrens claimed her Clarksburg yard as their own and she tells me they’ve made it through the worst.  I’m sure it’s because she provided them with the two things they need most in cold weather: food and shelter.

The food is her homemade peanut butter suet, a recipe she heard on Scott Shalaway’s radio program.  As Marcy says, the secret is real lard – no substitutes.  The recipe is variously attributed to Martha Sargent in Alabama and to Julie Zickefoose who published it on her blog.  If you’d like to try it, here it is:
No-melt Suet Recipe … (also called Zick Dough)
Melt 1 cup of lard and 1 cup of crunchy peanut butter in microwave or kettle.  Stir, then add:
     2 cups of quick cook oats
     2 cups yellow cornmeal
    1 cup of flour
     1/3 cup of sugar
Pour into square containers and freeze.

And what do Marcy’s wrens do for shelter?   They use this hanging basket. 

The side of her house and the greenery provide a wind break and the wrens have made home improvements by adding leaves, gray moss and the coconut fibers from Marcy’s plant liners.

It’s a delicious, cozy territory.  Quite a kingdom for the wrens.

(photo by Marcy Cunkelman)

Who Says Winter is Boring?

Tulip tree seed pod in winter (photo by Marcy Cunkelman)
Despite the continuing cold and snow, the battle to get in and out of winter coats and boots, and the difficulties of walking and driving in snowy weather, winter took a turn for the better in the past few days.

I was beginning to get bored by it but I perked up when I read some local sightings on PABIRDS and encountered some surprises on my own:

  • Last Friday Steve Gosser saw a peregrine falcon attack a juvenile bald eagle who was flying over the Allegheny River.  This was in downtown Pittsburgh at the 7th Street Bridge!
  • Yesterday morning Dorothy and E2, the Cathedral of Learning peregrines, met for breakfast on their favorite dining ledge on the northeast corner of the 30th floor.   It looked to me like he’d brought her food.  Courtship!
  • On Sunday I drove along the Ohio and Beaver Rivers and saw two bald eagles and two ravens near Dashields Dam, plus another eagle along the Beaver River.  If you’re looking for eagles, just a few moments at Dashields ought to turn one up.
  • Yesterday I had a pleasant surprise when I found a white-throated sparrow in Oakland near Craig Street.
  • And everyone knows I’m interested in the crow report.  Last evening a co-worker called me as she drove over the 31st Street Bridge to tell me the Allegheny River is frozen over and the crows were flying in and landing on the ice.  So that’s where they’ve gone.  Woo hoo!

The weather report says we’ll have above freezing temperatures starting tomorrow.  If it melts all at once the floods will provide more excitement than we want.  (!)

(photo of tulip tree seed pods by Marcy Cunkelman)

Cold Feet

Mourning Dove in winter (photo by Marcy Cunklelman)
Mourning dove (photo by Marcy Cunkelman)

11 January 2010

Yesterday a mourning dove landed at my feeder with a clenched foot, probably suffering from frostbite.  The temperature was 9oF when I saw him.  It had been 2oF at dawn.

Even in severe cold weather we rarely see birds with frostbitten feet.  Gulls and Canada geese stand on ice, cardinals and chickadees hop on snow, and we take for granted that their bare feet won’t be hurt as ours would be. Birds can do this because of a special adaption that allows their feet to be cold in comfort. 

Birds’ feet have fewer nerves and blood vessels and a unique circulatory system.  The veins and arteries in their legs are intertwined so that cold blood leaving their feet is warmed by the arteries delivering warm blood.  As Dr. Tony Bledsoe pointed out, “This operates as a counter-current exchange system, so that nearly all of the warmth in the descending blood is transferred to the ascending blood.”

For some reason this system isn’t as effective in mourning doves and their feet are prone to freezing.  Since they’re a game bird (did you know they’re hunted in 38 states?) they’ve been studied extensively.  In one study, mourning doves with frostbitten feet were rescued.  They recovered from their injuries in six weeks but their damaged toes fell off.  They survived to a normal life span with fewer toes, but life is short for a mourning dove anyway.  Their average adult life expectancy is only one year.

Though the mourning dove in my backyard may lose some toes I know he’ll survive if he has enough to eat.  The real killer right now is lack of food and since mourning doves eat from the ground their food is repeatedly covered by snowfall.

I’ll keep my feeders filled and hope for the best.

(photo by Marcy Cunkelman)

More?

Nearly 10" of snow (photo by Marcy Cunkelman)
It feels like it’s been snowing forever.

Marcy Cunkelman sent me this picture taken in her yard on Wednesday at a moment when – miraculously – it was not snowing.  Last night as she sent me email it was snowing heavily in the dark. 

The ruler is buried by now.  Good thing it’s bright orange.

(photo by Marcy Cunkelman)

Whitecaps and Ice

Monongahela River in winter, Pittsburgh (photo by Kate St. John)
Day after day we’ve had unusually cold weather with highs in the teens and windchill as low as minus 10.  This may be springlike in the Arctic but it’s too cold for Pittsburgh. 

Most people stayed indoors yesterday but I was itching for a walk so I bundled up and trudged from my home in Greenfield across the Hot Metal Bridge to South Side’s riverfront park. 

I was hoping to see some really good birds but that was not to be.  Instead I was treated to whitecaps and ice. 

Yow! it was cold!  I tried to show the whitecaps in this picture but I couldn’t zoom my cell phone camera with my gloves on and my eyes watered as I faced the wind.  I’m lucky the camera could focus.

See that white skim on the river?  That’s ice.  Beyond it is a raft of ring-billed gulls riding the waves.  Periodically they lift off and ride the wind instead. 

Behind me a flock of mallards wait for their patrons to arrive with a handout of bread.  Canada geese fly to the river or fly back to the grass at the Technology Center.  A mockingbird “chakks” to claim his patch of oriental bittersweet.

If I’m brave I’ll go back to the park later this week to see what new birds show up.  The colder it gets the more likely a really good bird will arrive to take advantage of the open water.   

Brrrrr!

(photo by Kate St. John)

I’m Dreaming of a White Christmas

White Christmas (photo by Marcy Cunkelman)
OK, I’ll admit it.  I love snow.  I hate to drive in it but everything else about it is gorgeous. 

I love when it’s 28oF with no wind and there are big snowflakes falling around me.  Better yet, I love the day after a snowstorm when the sky clears and the sun glints on untouched snow.  Bing Crosby describes my ideal in his song White Christmas.  Beautiful!

But I’m conflicted.  As I said, I hate – even avoid – driving in snow so I’ve been keeping track of the holiday weather forecast because I’ll be driving the Pennsylvania Turnpike to visit my husband’s family on Christmas (my husband doesn’t drive).  I look at the forecast every day.  Will there be snow?

The good news is that it won’t snow on Christmas Day, the bad news is it’ll rain.  Cold rain.  A forecast high of 41oF in Pittsburgh and 36o in Somerset which is, in my opinion, the Bad Weather Capitol of Pennsylvania and guaranteed to have the worst weather on the Turnpike.

Alas.  Western Pennsylvania looks like Bing Crosby’s White Christmas right now but when Christmas Day comes I’ll just have to dream of it.

(photo by Marcy Cunkelman)

The Sun Stands Still

Sun pillar in Pittsburgh (photo by Kate St. John)
Sun pillar in Pittsburgh (photo by Kate St. John)

21 December 2009

Today is the winter solstice, the day the sun stands still.  That’s what it means in Latin:  sol is sun and stice is from sistere meaning to stand still.

I doubt that most modern day people notice the sun stops its southward movement today, pauses, and in the days ahead begins to move north.

We can afford to ignore it.  We have electricity and our days aren’t governed by the sun’s movement so we can safely leave the calculations of its passage to others.  They’ll let us know.

Besides, the change is slow, something our brains have little patience to observe.  We’re wired to notice rapid movement because it can mean danger or food.

Our gadgets take advantage of this trait and provide a constant source of movement and distraction.  I know this all too well.  My computer and cell phone distract me all the time.  The up side is that my cell phone can take pictures like this one of a sun pillar.

Sun pillars are usually brief events that occur when the sun is close to the horizon and its light reflects on ice crystals that have nearly horizontal and parallel planar surfaces.  In other words, the ice crystals lined up just right and so did the sun.

Will I notice the sun standing still today?  No.  I’m glad someone told me about it.

(photo of a sun pillar in Pittsburgh by Kate St. John)

Snow

Snow on pines (photo by Dianne Machesney)
Our first big snow of the season accumulated yesterday and threw a wrench into several Christmas Bird Count events, affecting both the number of participants and the number of birds.  Snow is lingering this morning so it’ll affect today’s counts as well.

The first snow always changes the mix of birds.  Species who don’t like it leave the area and those who do move in. 

We’ve had large flocks of American robins in Pittsburgh for weeks but the snow cover will prompt them to leave for the south.  Meanwhile snow buntings, rough-legged hawks and short-eared owls will be easier to find near Volant in Lawrence County now that the ground is covered. 

It’ll be interesting to see who’s here and who’s not by mid-week. 

Bundle up and enjoy it!

(photo by Dianne Machesney)

Winter beauty

Latodami Field, North Park, 29-Nov-09 (photo by Dianne Machesney)
Winter in Pittsburgh is mild compared to Pennsylvania’s northern and mountainous regions. 

Yesterday it snowed but didn’t stick – at least in my neighborhood.  We usually don’t have snow cover in the city until late December, and then it’s likely to melt.  Even so, a snowless winter can be beautiful when the sun shines, as it will today. 

Here’s a photo Dianne Machesney took a week ago at Latodami’s upper field in North Park.  The muted browns of winter have a special kind of beauty.

(photo by Dianne Machesney)