Showing posts with label Great-horned Owl. Show all posts
Showing posts with label Great-horned Owl. Show all posts

Monday, November 30, 2015

Whoo Is That Owl?


It’s that time of year again.  The owls are very active finding mates, defending territories, and preparing their nests for babies. 

It’s a great time to see and hear owls right in your own backyard!  But sometimes it can be a little bit tricky figuring out just Whoo you are observing.  This especially happens when you only hear an owl calling without ever seeing one.
Coal, one of WBS's resident Great Horned Owls (photo: Paige Davis)

In Missouri, as well as in many other areas in the United States, the most common owls that you will encounter are Great-Horned Owl and Barred Owl.  Since it is more common to hear an owl than to see one, it is a great idea to familiarize yourself with their calls. 

The Great-Horned Owl has that stereotypical hoot you hear in a spooky movie.  It is said to sound like they are saying, “Hoot-a-hoot, hoo-hoo, who's awake? Me too!”   To hear what they sound like Click Here.
Jersey, WBS's resident Barred Owl (photo: Paige Davis)

The Barred Owl makes a variety of calls.  They can sometimes even sound like monkeys making all sorts of racket in the forest.  Their classic call is said to sound like, “Who cooks for you, who cooks for you all?”  By familiarizing yourself with these owl calls, you can identify an owl species without ever seeing it.  To hear what a Barred Owl sounds like Click Here.

Both the Great-Horned Owl and the Barred Owl are larger sized owls.  The Great-Horned Owl stands about 22 inches tall and has a 4.5 foot wingspan with females being larger than males.  They are mottled gray-brown, with a white patch on the throat, and ear-like tufts atop their head that resemble horns.  Their eyes are large and yellow. 

The Barred Owl stands about 20 inches tall and has a 4 foot wingspan with females being larger than males.  They are gray and white overall, with dark bars of feathers going down their chest. The wings and tail are barred brown and white.  Their eyes are very dark brown, which can look completely black from afar.  The Barred Owl does not have ear tufts like the Great-Horned Owl does, and instead has a rounded head.

Although these are the two most common owls you may encounter, there are many  other owl species that live here in North America.  Just a few of the other native species include the Eastern Screech Owl, Barn Owl, Long-Eared Owl, Northern Saw-Whet Owl, Short-Eared Owl, and Snowy Owl.

If you would like the opportunity to meet many owl species up close and personal, come to one of World Bird Sanctuary’s Owl Prowls!  The Prowls Feature live flying owls and an easy night hike to try to call in resident wild owls.  It is a great program for any owl lover.

Owl Prowls take place on select dates from November-March starting at 7 pm.
To learn more about the World Bird Sanctuary Owl Prowls CLICK HERE.

Make your reservation today by calling 636-225-4390 x 101

Submitted by Paige Davis, World Bird Sanctuary Naturalist

Tuesday, November 17, 2015

Whooo''s Who?


With the advent of Fall leaf color, Thanksgiving pumpkins, and cold crisp weather, love is in the air here in Missouri—at least it is if you’re an owl!

If you happen to be outdoors in the evening or late at night you may hear an owl calling.  At this time of the year our feathered creatures of the night are busy claiming a territory, and soon will be advertising for a mate. 

In our last blog we posed a little owl quiz with links to some audio bites of owl calls to test your knowledge.  Here are the answers to our quiz, as well as a few facts about each of those fascinating creatures.

Each of the photos is of a resident of the World Bird Sanctuary and represents his or her species.

Owl photo collage: Gay Schroer
Photo #1 is Timber the Eastern Screech Owl (Megascops asio)
Photo #2 is Jake the Great Horned Owl (Bubo virginianus)
Photo #3 is Goblin the Common Barn Owl (Tyto alba)
Photo #4 is Xena the Eurasian Eagle Owl (Bubo bubo)
Photo #5 is Olaf the Saw-whet Owl (Aegolius acadicus)
Photo #6 is Buzz the Tawny Owl (Strix aluco)
Photo #7 is Jersey the Barred Owl  (Strix varia)
Photo #8 is Mia the Spectacled Owl  (Pulsatrix perspicillata)

Now for the answers to our quiz:
Jersey the Barred Owl (photo: Gay Schroer)
A.            This owl’s call seems to be concerned about your dinner.  Photo #7 – Jersey the Barred Owl.  This bird’s call is said to sound like “Who, who, who cooks for-you” “Who, who, who cooks for-you-all”.  Barred owls are one of the most common owls in the Eastern U.S.  This bird is often locally referred to as a “hoot” owl.
Goblin a Common Barn Owl (photo: Gay Schroer)
B.            No wimpy hooting for this bird—it communicates with a high-pitched hissing scream.  This would be #3.  Pictured is Goblin the Common Barn Owl.  Did you know that Barn Owls are found on every continent except Antarctica?  Barn Owls have been on the endangered list here in Missouri due to habitat loss.  For a number of years WBS has been at the forefront of an effort to release captive bred Barn Owls back into the wild to bolster declining populations.
Timber, an Eastern Screech Owl (photo: Gay Schroer)
C.            Don’t let this bird’s sweet trilling call fool you—it’s a fierce little predator.  This would be #1.  Pictured here is Timber the Eastern Screech Owl. Eastern Screech Owls are generally seen in two color phases—red and grey, although there are occasionally intermediate brown shades of these two colors.  Their call is a mellow muted trill—no hooting for this bird.
Olaf, a Saw-whet Owl (photo: Gay Schroer)
D.            This owl’s call is a monotonous “hoop-hoop-hoop”, but its volume belies its diminutive size!  #5 - The Northern Saw-whet Owl has a surprisingly loud call for such a small bird.  Pictured is Olaf, a World Bird Sanctuary resident bird. When prey is plentiful, a Saw-whet Owl will kill as many as 6 mice in rapid succession, without consuming any of them. The excess food is cached in safe places and, in winter, is thawed out later by "brooding" the frozen carcass. When food is plentiful, it is common for only the head of each prey item to be eaten.
Jake, a resident Great Horned Owl (photo: Gay Schroer)
E.            The male of this species calls with a low-pitched monotone “ho ho-ho hoo hoo”, and is answered with a higher pitched “girly” version of the same call.  This would be #2, the Great-horned Owl.  Pictured is Jake, a WBS resident owl.  A Great Horned Owl is powerful enough to take prey two to three times heavier than itself.  Longevity is up to 13 years in the wild and as much as 29 to 38 years in captivity.
Mia, our beautiful Spectacled Owl (photo: Gay Schroer)
F.            This owl’s vocalization sounds like a knocking or tapping, “Pup-pup-pup-pup-o” issued in a rising crescendo.  (Hint – This owl is not native to the U.S., but you may have heard it if you’ve been to the World Bird Sanctuary’s weathering area lately.)  #8 is Mia the Spectacled Owl, and she can usually be found in the weathering area behind the WBS’s Nature Center building.  This owl hales from Mexico, Central and South America, most frequently found in dense tropical rain forests.  Once fledged, at about 5-6 weeks, the chicks depend on the parents for up to a year.
Buzz, a Tawny Owl (photo: Gay Schroer)
G.            This owl was the inspiration for the owl in the Winnie the Pooh tales and is the most common owl in Europe—especially in England.  #6 – The Eurasian Tawny Owl will usually nest in tree holes or nest boxes in trees, and pair bonds last for life.  Even though these owls are small they will defend their nest aggressively, even attacking humans on occasion if they perceive them as a threat to the nest.
Xena, everyone's favorite Eurasian Eagle Owl (photo: Gay Schroer)
H.            This owl issues a long, booming “oo-hooh”, and may even bark and growl if it feels threatened.  This would be #4 – the Eurasian Eagle Owl.  Pictured is Xena, one of our most popular resident birds.  This largest owl species eats mainly voles and rats, but has been known to take prey as large as a Roe Deer fawn.  They nest on cliff ledges, crevices between rocks, and cave entrances, although they are not above using abandoned nests of large birds. 

To meet some of these fascinating creatures, join us for an OWL PROWL  For information on WBS Owl Prowls Click Here or call 636-225-4390, Ext. 101.

Submitted by Gay Schroer, World Bird Sanctuary Volunteer

Thursday, July 30, 2015

Raptors Extinct and Extant


While working at World Bird Sanctuary’s Stone Zoo bird show in Boston, I have learned to make three major distinctions indicative of raptors: excellent eyesight, strong grasping feet and a sharp, curved beak.

Steven Spielberg’s Jurassic Park has made Velociraptors famous, but what do these prehistoric “raptors” have in common with modern raptors? They certainly don’t have a curved sharp beak or grasping feet.

It turns out Velociraptors and other theropod dinosaurs with raptor in their name such as Oviraptor or Eoraptor aren’t even closely related.  However they are united under the Maniraptoran clade, which means “seizing hands,” a nice parallel to extant (meaning living today) raptors’ seizing feet. They are defined as being more closely related to birds than other dinosaurs.


Dromaeosaurid (photo: wikipedia by Tom Parker)

Dromaeosaurs, or “running lizards,” are a group of Maniraptors containing Velociraptors and other “true” prehistoric raptors defined by their large grasping hands, a stiffened tail and one large, slashing claw on each foot. Modern birds of the Aves class are the sister group to Dromaeosaurs. You can compare an artists’ rendition of an extinct  raptor to our extant raptor, Diablo the Tawny eagle below.


Today we have many different raptors within Aves, which belong to different groups as well. The orders Accipitriformes, Strigiformes and Falconiformes are an example of convergent evolution and each produced unique raptor species.

Accipitriformes is the most diverse raptor order consisting of many different families of eagles, hawks, harriers, kites, osprey, the secretary bird and Old World vultures.  New World vultures of the Americas are not related to Old World vultures of Africa, Europe and Asia.  They have merely evolved to fulfill similar ecological niches.


Osiris, the Egyptian Vulture is an Old World Vulture (photo: Gay Schroer)


Baton Rouge, a King Vulture, is a New World Vulture (photo: Gay Schroer)

New World vulture phylogenic placement has proven to be difficult with DNA evidence supporting their inclusion in both the bird orders of Accipitriformes and Ciconiiformes or storks. Old World vultures are true raptors, while New World vultures lack the strong grasping feet of raptors. You can make this comparison between Osiris the Egyptian vulture (Old World) and Baton Rouge the King vulture (New World) at our Stone Zoo bird show.

Riley, a Barn Owl (photo: Aurora Potts)

Strigiformes consist of two main families of owls; barn owls and typical owls. Owls are mostly nocturnal and are therefore more sound sensitive than other raptors. Barn owls belong to the family Tytonidae.  Their face is heart-shaped and their legs are longer than that of Strigidae owls. Typical owls belong to the more varied family, Strigidae. You can see these distinctions on Riley the American Barn owl and Reese the Great Horned owl at our Stone Zoo bird show.

Reese, a Great Horned Owl (photo: Aurora Potts)

Naturally, Falconiformes are falcons, which are more closely related to songbirds and parrots than they are to any other raptor (believe it or not). Falcons are the speedy and agile birds of prey that use their tomial tooth at the end of their beak to break their prey’s spine. You can see the notch that is the tomial tooth on this Peregrine falcon on exhibit at Stone Zoo.

A Peregrine Falcon on exhibit at Stone Zoo

Even though extinct and extant raptors are hardly related, you can see all these fascinating predators possess many adaptations.   Their unique characteristics allow for a wide variety of species to share the generally speedy seizing and grasping raptorial name in prehistoric times and up to modern day.

Submitted by Aurora Potts, Naturalist/Trainer for World Bird Sanctuary’s Stone Zoo Show


Monday, February 9, 2015

Only One Owl Prowl left with limited space! Book today!

There is only one Owl Prowl left in the 2014/2015 season.  This popular program, awarded the AAA’s Midwest Traveler's Travel Treasure for the Midwest, will be over at the end of February and are selling out quickly.

Wild Barred Owl.
Photo used with kind permission of Patrick Lanham Photography
Come over to the Dark Side and meet the amazing birds that exist by moonlight.  World Bird Sanctuary Owl Prowls offer an exciting opportunity to learn more about the fascinating lives of owls.

Join one of our Naturalists at our evening programs - a 30 minute presentation featuring live flying owls, followed by an easy night hike around our grounds as we try and find wild Barred Owls and Great-horned Owls who are busy setting up territories and finding mates for the winter owl breeding season!

Owl Prowls offer a unique opportunity to see owls in flight!
Photo with kind permission of Sandra's Shooting Gallery.
Only one date left with space for you!
We have a limited number of dates with some spaces for remaining Owl Prowls, so book today to avoid last minute disappointment. 

February 2015
Friday, February 20th


Meet beautiful owls like Tundra, the Snowy Owl, at a WBS Owl Prowl!
Photo with kind permission of Sandra's Shooting Gallery.
All Owl Prowls start at 7pm and are concluded by 9pm.
To book, call our Education Center at 636-225-4390 ext. 1.
$11 per adult; $9 per child under 12.
Friends of World Bird Sanctuary receive a 10% discount.
Groups of 10 or more pay $9 per person, regardless of age.

With only 30 people per Owl Prowl and selected dates available, call today to make your reservation!

Blog submitted by Catherine Redfern


Monday, January 26, 2015

The Last Owl Prowls of the Season have just a few spaces left. Book Today!

There are just a handful of spaces left on each Owl Prowl before the season is over!  This popular program, awarded the AAA’s Midwest Traveler's Travel Treasure for the Midwest, will be over at the end of February and are selling out quickly.

Wild Barred Owl.
Photo used with kind permission of Patrick Lanham Photography
Come over to the Dark Side and meet the amazing birds that exist by moonlight.  World Bird Sanctuary Owl Prowls offer an exciting opportunity to learn more about the fascinating lives of owls.

Join one of our Naturalists at our evening programs - a 30 minute presentation featuring live flying owls, followed by an easy night hike around our grounds as we try and find wild Barred Owls and Great-horned Owls who are busy setting up territories and finding mates for the winter owl breeding season!

Owl Prowls offer a unique opportunity to see owls in flight!
Photo with kind permission of Sandra's Shooting Gallery.
Owl Programs with spaces available on selected evenings from February thru March 2015
We have a limited number of dates with some spaces for remaining Owl Prowls, so book today to avoid last minute disappointment. 

February 2015
Friday, February 6th
Saturday, February 7th
Friday, February 20th

March 2015
Saturday, March 14th

Meet beautiful owls like Tundra, the Snowy Owl, at a WBS Owl Prowl!
Photo with kind permission of Sandra's Shooting Gallery.
All Owl Prowls start at 7pm and are concluded by 9pm.
To book, call our Education Center at 636-225-4390 ext. 1.
$11 per adult; $9 per child under 12.
Friends of World Bird Sanctuary receive a 10% discount.
Groups of 10 or more pay $9 per person, regardless of age.

With only 30 people per Owl Prowl and selected dates available, call today to make your reservation!

Blog submitted by Catherine Redfern


Saturday, December 27, 2014

Owl Prowls are filling up quickly - have you booked your space?

We are halfway through Owl Prowl season!  This popular program, awarded the AAA’s Midwest Traveler's Travel Treasure for the Midwest, will be over at the end of February and are selling out quickly.

Wild Barred Owl.
Photo used with kind permission of Patrick Lanham Photography
Come over to the Dark Side and meet the amazing birds that exist by moonlight.  World Bird Sanctuary Owl Prowls offer an exciting opportunity to learn more about the fascinating lives of owls.

Join one of our Naturalists at our evening programs - a 30 minute presentation featuring live flying owls, followed by an easy night hike around our grounds as we try and find wild Barred Owls and Great-horned Owls who are busy setting up territories and finding mates for the winter owl breeding season!

Owl Prowls offer a unique opportunity to see owls in flight!
Photo with kind permission of Sandra's Shooting Gallery.
Owl Programs offered on selected evenings from January thru March 2015
We have a limited number of dates with some spaces for remaining Owl Prowls, so book today to avoid last minute disappointment. 

January 2015
Sunday, January 4th,
Friday, January 9th,
Saturday, January 10th,
Saturday, January 31st,  

February 2015
Friday, February 6th
Saturday, February 7th
Saturday, February 14th
Friday, February 20th
Saturday, February 28th

March 2015
Friday, March 6th
Saturday, March 14th

Meet beautiful owls like Tundra, the Snowy Owl, at a WBS Owl Prowl!
Photo with kind permission of Sandra's Shooting Gallery.
All Owl Prowls start at 7pm and are concluded by 9pm.
To book, call our Education Center at 636-225-4390 ext. 1.
$11 per adult; $9 per child under 12.
Friends of World Bird Sanctuary receive a 10% discount.
Groups of 10 or more pay $9 per person, regardless of age.

With only 30 people per Owl Prowl and selected dates available, call today to make your reservation!

Blog submitted by Catherine Redfern