Archive for the 'Bird Behavior' Category

Jul 24 2015

Learn About Burrowing Owls

This week a cute video of burrowing owls in Florida went viral on the web and prompted some questions about these adorable raptors.

Where do burrowing owls live?  What do they eat?  Was the Florida video taken in the wild?

Burrowing owls (Athene cunicularia) range from North to South America in dry, open areas with short vegetation and no trees.  In the U.S. they live year-round in Florida, the Southwest and California and breed in the Western dry plains and high plateau.

These owls need wide open spaces but are not picky about humans nearby.  They’ll happily dig or take over an existing burrow in remote locations as well as parks, vacant lots, pastures and campuses (Florida Atlantic University).  So yes, that video in Florida with people in the background was taken in the wild.

Burrowing owls eat insects, rodents, snakes and whatever they can catch, but they are small so they are wary.  They look cute when they stand tall but they’re actually watching for large raptors and mammals that might eat them.

How small are they?  The video above shows a research project last summer at Boise State University in which the students learn to hold, measure and band the owls.  What a privilege to learn about burrowing owls up close!

Don’t miss the end of the video when the owlets are released near their burrow.  Yes, they really are cute.

 

p.s.  Click here if you haven’t seen the Florida video.

(YouTube video from Boise State University, Boise, Idaho)

 

7 responses so far

Jul 17 2015

Repeat Offender

Published by under Bird Behavior

We’ve seen gulls stealing food outdoors but this bird went to the store.

Back in 2007 a herring gull became famous for repeatedly walking into a shop in Aberdeen, Scotland and stealing bags of Doritos from the lowest shelf by the door.

Eventually he became a celebrity on the nightly news and earned the nickname Sam.

When store management told the staff to close the door to stop Sam’s shoplifting, customers donated money to pay for Sam’s habit.

Sam remained a repeat offender.

 

(video from YouTube)

p.s. In Scotland the chips are called “crisps.”

One response so far

Jul 13 2015

Father-Daughter Pair in Norfolk

'Dad' and 'tHE Missus', Norfolk, Virginia (photos by Mike Inman, used by permission)

‘Dad’ and his mate ‘HE’ in Norfolk, Virginia, 2015 (photos by Mike Inman used by permission)

In a recent Peregrine FAQ I described how peregrine falcons are not social creatures like we are.  In fact most raptors don’t hang out with their relatives, so that siblings from different years and birds separated by more than one generation can’t know that they’re related.

Since they don’t know their relatives, how do raptors avoid interbreeding?  By traveling.

Young raptors naturally disperse far from home and females typically travel twice as far as males, thereby mixing the gene pool.  Here’s how far some of Pittsburgh’s peregrines traveled from where they were born:

  • Downtown Pittsburgh: Louie dispersed 2.3 miles, Dori traveled 93 miles from Akron, Ohio
  • Cathedral of Learning: E2 dispersed 2.3 miles, Dorothy traveled 450 miles from Milwaukee, Wisconsin
  • Neville Island I-79: Beau dispersed 10.7 miles, Magnum traveled 79 miles from Canton, Ohio

Bald eagles are much more social than peregrines. They fish and roost together in early winter but when it comes time to breed they disperse far and wide.  Close interbreeding among bald eagles is rare.

That’s why it was such a surprise to discover that this year’s pair nesting near Norfolk Botanical Garden is father and daughter.

The male is not banded but he has a unique tiny black dot in his left iris, called an inclusion, that’s visible in good photographs. This identified him as the 25-year-old male that used to nest in the Garden.

His mate is banded with the code “HE,” a band she received six years ago when she was a nestling at Norfolk Botanical Garden.  Yes, she’s his daughter.

Their close relationship was reported this spring by the Center for Conservation Biology (CCB) that monitors bald eagles in Virginia and banded “HE” in 2009.   CCB’s blog article provides details and photos.

It’s unusual for a female to settle so close to her birthplace but this location has had many challenges.  After the old female was killed by an airplane at nearby Norfolk International Airport in 2011, eagles were no longer allowed to nest at the Garden.  The male and all his potential mates were harassed away.  Nine nests were destroyed.  All the females left. The male didn’t nest for three years.  (Click here for the story.)

Unusual as this pairing is, the good news is that he finally found a mate, they found a safe place to nest, and together they fledged one eaglet on May 29.

It all worked out in the end.

 

(photos of the NBG pair courtesy of Mike Inman, inmansimages.com)

p.s. As part of their monitoring efforts CCB recently identified a female bald eagle with an unusual story. Click here to read about ‘Dolly’, born at the Birmingham (Alabama) Zoo to injured, unreleasable parents, she now nests along the James River in Virginia.

No responses yet

Jun 26 2015

Not Exactly Squirrel Proof

Published by under Bird Behavior,Mammals

Red-bellied woodpecker and chipmunk at squirrel-proof bird feeder (photo by Jonathan Nadle)

Red-bellied woodpecker and chipmunk dining at a squirrel proof feeder (photo by Jonathan Nadle)

Jonathan Nadle’s neighbor has a squirrel proof bird feeder but it doesn’t keep out all the squirrels.

A small member of the Sciuridae (squirrel) family squeezes though the mesh and helps himself to seeds.

A lot of birds won’t visit while the chipmunk’s there — did you know chipmunks eat bird eggs? — but the red-bellied woodpecker has nothing to fear. His long sharp bill is a formidable weapon.

Red-bellied woodpecker and chipmunk coexist at the squirrel-proof bird feeder (photo by Jonathan Nadle)

(photo by Jonathan Nadle)

“Squirrel proof” might not work for chipmunks but at least it keeps out Pennsylvania’s largest member of the squirrel family –> groundhogs.

 

(photos by Jonathan Nadle)

p.s. Gray squirrels are in the Sciurinae (tree-based) subfamily. Groundhogs and chipmunks are both in the Xerinae (ground-based) subfamily and members of the Marmotini tribe (marmots!).

2 responses so far

Jun 19 2015

Recognize Individual Song Sparrows

Song sparrow at Schenley Plaza, 2013 (photo by Peter Bell)

Song sparrow at Schenley Plaza (photo by Peter Bell)

Believe it or not with practice you can recognize individual song sparrows by voice.

I learned this when I read about the pioneering work of Margaret Morse Nice in Columbus, Ohio.  In 1928 she began an eight year study of song sparrows at her home along the Olentangy River.  Her Studies in the life history of the Song Sparrow changed the course of American ornithology.

Margaret Morse Nice banded the song sparrows and made meticulous observations of their behavior.  She listened carefully to their songs and wrote down the variations including the phrases they borrowed from neighbors.

Her research spawned many studies of song development. We now know that: Songbirds learn their songs by listening when they are adolescents, practicing phrases, and eventually mastering their species song.  Each bird then improvises to make the song his own.  The males work hard to be skilled and unique singers because the females are attracted by the best courtship songs.

I wondered if I could recognize an individual’s song so I started at home.

My backyard is the territory of a male song sparrow whose tune I hear every morning.  Eventually I learned his morning song(*). If I could write musical notation I’d put it here.

From my front porch I can hear “my” song sparrow and my neighbor’s front yard sparrow counter-singing to maintain their territories.  I know those two don’t sound the same.

I can’t identify more than one tune yet but I can recognize “my” song sparrow in the morning now.

Try it and see.

 

(photo by Peter Bell)

(*) Dr. Tony Bledsoe says that each song sparrow may have up to five distinct songs.  So though I’ve learned the “Good morning” tune I’ve got a lot more learning to do!

9 responses so far

Jun 18 2015

TBT: Food For Thought

Gray squirrel (photo by Chuck Tague)

Gray squirrel (photo by Chuck Tague)

Why are songbirds angry at squirrels?

On Throw Back Thursday (TBT), here’s some Food For Thought from June 2008.

 

(photo by Chuck Tague)

One response so far

Jun 05 2015

How To Find A Raptor

Red-tailed hawk mobbed by crows (photo by Dori via Wikimedia Commons)

Red-tailed hawk chased by crows (photo by Dori via Wikimedia Commons)

Are you looking for a hawk, an owl, or a fledgling raptor?  Have you seen a juvenile peregrine fly around the corner but now that you’ve made that walk (or run!) you can’t find him?

Stop, listen, and watch for other birds.  They’ll tell you where he is.

Small birds sound the alarm when a bird of prey is near.  In the breeding season they surround and mob the raptor if they think they can get away with it.  They’re trying to drive the raptor away from their nests.

Robins are my favorite hawk-alarms because they’re so loud and persistent.  Other species join them and they all get louder and louder.  When the crows show up it becomes a chase.

So if you need to find a raptor (at a Fledge Watch, for instance) listen for the smaller birds, look where they’re looking and you may find the raptor — though perhaps not the one you’re looking for.

 

(photo by Dori via Wikimedia Commons. Click on the image to see the original)

p.s. American robins’s eyes look sideways, not straight on like ours, so you’ll have to pick one side of the head and follow the sight-line from there.  Confusing!

p.p.s.  Mark your calendars for Downtown Pittsburgh Fledge Watch, June 13-20, daylight hours.  Announcements and instructions will roll out in the next several days.  Stay tuned at Outside My Window. Check the Events page for updates.

3 responses so far

Jun 04 2015

Don’t Make Me Lower My Voice!

Song sparrow (photo by John Beatty)

Song sparrow (photo by John Beatty)

When observing songbirds closely, I sometimes notice that a bird is singing softly.  He sings his species tune but he’s whispering.

Among American robins I’ve seen soft song used in courtship but with song sparrows it’s not a sweet activity.

In a study conducted by Duke University, researchers found that song sparrows use soft song only in aggressive male-on-male interactions.  In fact, “the amount of soft song produced is the only singing behavior that can be used to reliably predict a subsequent attack by the singer.”

In other words, if a song sparrow lowers his voice he’s really angry.  Click here to read the study.

“Don’t make lower my voice!”

It’s a useful parenting tool among humans, too.  😉

 

(photo by John Beatty. Click on the image to see the original)

4 responses so far

May 14 2015

Nowhere To Stand

Common grackles contempplating the Mon River (photo by John English)

Common grackles contemplating the Monongahela River (photo by John English)

These common grackles appear to be inspecting the Monongahela River at Duck Hollow. Perhaps they want to touch the water but there’s nowhere safe to stand.

Though grackles aren’t water birds they’re known to dip their food in water, a trait they may have inherited from their ancestry.

On Throw Back Thursday, watch a video of grackles dunking their food even when it doesn’t need it in this article from 2012: Dunkin’ Peanuts.

 

(photo by John English)

 

No responses yet

May 13 2015

Eats Ticks And Shouts

Published by under Bird Behavior

Helmeted guineafowl (photo by Dick Daniels via Wikimedia Commons)

Helmeted guineafowl (photo by Dick Daniels via Wikimedia Commons)

In my experience, you know you’re in a tick-infested Lyme-disease hotspot when you see deer fencing and this bird roaming nearby.

Deer fencing keeps deer out of the garden.  This bird keep the ticks at bay.

Helmeted guineafowl eat insects, seeds and weeds and are best known (to me) for eating ticks.  Studies have shown they make a significant dent in the tick population on lawns but don’t keep them in an urban or suburban area.  Your neighbors will hate you.

Native to arid south and central Africa, helmeted guineafowl (Numida meleagris) have been kept as a source of food for thousands of years but they’ve never become as domesticated as chickens.  They love to shout and roam.

They are great talkers who keep up a constant conversation with each other and shout warnings for every danger known to guineafowl.   Unfortunately, once they get going they are loud and prolonged about dangers that don’t matter to us humans.  Sometimes their shouting makes us laugh …

… but after a while the neighbors hate them, not only because they shout but because they refuse to stay at home.

Inveterate free-rangers, they will roost in trees and walk off to find better eating elsewhere.  Gunieafowl advice columns warn to be prepared to lose them to foxes, coyotes, dogs and owls, especially if you try to keep them at home by clipping their wings.  They want to visit the neighbors.

However, if you live in a remote place with lots of ticks they’re worth the effort.

I was naive the first time I saw a guineafowl roaming a front yard near New Jersey’s Belleplain State Forest.  Back then, a decade ago, I had never been to a truly tick-infested place until I walked into that forest.  About five years ago I noticed a guineafowl inside a deer fence in northern Jefferson County near the Clarion River and it too was a tick-infested hotspot. Oh my gosh!

So if you see this bird and deer fencing, pull your socks over your pant legs before you get out of the car!

You can’t miss noticing the guineafowl.  He eats ticks and shouts.

 

(photo by Dick Daniels via Wikimedia Commons. Click on the image to see the original)

6 responses so far

Next »

Bird Stories from OnQ