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Journal
(Blog)


Raptor Free Flight resumes at the Arizona-Sonora Desert Museum, November 2022.

11/7/2022

4 Comments

 
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Crested Caracara in the air,  October 31, 2022. 


It is now November in Tucson, and cool weather has returned to the desert.  The Arizona-Sonora Desert Museum, a "cool place" year round, is now, well, cooler.  With the cooler weather comes the return of Raptor Free Flight with one flight a day at 10 am, every day but Wednesday through April 9, 2023.  For more on the museum and free flight in the past, see my posts from November 2015, Raptors at the Arizona-Sonora Desert Museum,  December 17, 2016, Late Fall in Tucson, Birds East to West, and October 25, 2017, What is a Caracara, and why should I care, or, care, or, or,  . . . whatever . . .

On Halloween I arrived when the museum opened, and was greeted by a volunteer just outside the gate with a Burrowing Owl. 

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Canon R6 with RF 100-500mm at 300mm 1/1000 sec., f/5.6, ISO 3200, +2/3EV. 

Burrowing Owls live year round throughout the Americas, including SE Arizona, migrating north to breed in the U.S. west of the Mississippi and into Canada. They live underground in burrows and hunt insects and rodents during the day.  For more on this special bird, see my post of January 14, 2018, Santa Cruz Flats, where we found them in their natural habitat south and west of Picacho Peak.  The post also has photos of two other birds we will see today at the museum, the Great Horned Owl, and the Crested Caracara.

Next stop, the entrance to the museum.  I have an annual pass (highly recommended for Tucson residents), members gate to the right.  The museum is well staffed with knowledgeable volunteers.
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If you have an annual pass, you get free coffee  (it is very good!) at the cafe adjacent to the gift shop, to the left as you enter the museum.  The patio, photo below,  is a great place to start your day, and who can pass up a good cup of coffee on a chilly morning?
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The morning sun lit up the desert adjacent to the cafe, image below.
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Not far from the cafe I found this Cactus Wren, up close right next to the path, and pretty oblivious to my presence.  I was able to catch this image before he decided to move on to the next bush. 

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Canon R6 with RF 100-500mm at 186mm 1/1000 sec., f/5.0, ISO 1600, +2/3EV. 

The Cactus Wren is a year round resident of the deserts of SE California, southern Arizona and New Mexico as well as southern Texas and the low lying deserts of Mexico including Baja California. They eat mostly spiders and insects but also fruit.  They get the majority of water from the food they eat, rarely drinking standing water, a real survival advantage for a desert dweller.  They are known for uttering a ratchety-ratchety sound (noise?) reminiscent of someone trying to start a very old Ford! 

Note for the photo geeks: This was shot with a Canon R6 with a RF 100-500mm zoom lens at 186 mm,  1/1000 sec, f/5.0, ISO 1600, +2/3 EV.  I cannot tell how close I was to the bird from the camera data, but I do know that the RF 100-500 will focus as close as 90 cm, just under three feet, and I was probably at the limit.  This is very close for a zoom lens.  So, if you are in the market for a zoom lens for birding, check the minimal focus distance.  There is a real advantage to being able to focus up close.

If you have not been to Raptor Free Flight before, grab a map or ask a volunteer, and follow the little round signs. The path meanders downhill to the viewing area just below Cat Canyon off of the eastern portion of the Desert Loop Trail. 
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On a clear November day, after a night of rain, views from the trail are spectacular. 
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Plan on arriving at the viewing area about 9:30 am to get a good spot.  Bring lots of water; even in the winter it is dry.  

Chihuahuan Raven


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Canon R6 with RF 100-500mm at 500mm 1/4000 sec., f/7.1, ISO 2500, +1EV. 

The Arizona-Sonora Desert Museum has 2 Chihuahuan Ravens in residence, both birds rescued and unable to return to the wild. Chihuahuan Ravens are smaller than Common Ravens, with longer nasal bristles and white bases to the body feathers, which we might be able to see in the image above.  These characteristics may be difficult to distinguish in the field, unless both species are side by side.

Chihuahuan Ravens live in the southern central U.S. and Mexico, including Texas, New Mexico and portions of Arizona.  They prefer hot, dry, open country with grasslands, generally away from urban populations.    Most of the ravens we see in and around urban Tucson are Common Ravens, with the Chihuahuan population more likely seen out in the surrounding rural desert.  

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Canon R6 with RF 100-500mm at 500mm 1/4000 sec., f/7.1, ISO 2500, +1.5 EV. 

Image above, a Chihuahuan Raven on a trainer's glove.  Below, one of the pair comes in for a landing at the Cat Canyon overlook. 

Cat Canyon is another spot to view the Raptor Free Flight, especially if you are not up for the trek down the Desert Loop Trail. 

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Canon R6 with RF 100-500mm at 500mm 1/4000 sec., f/7.1, ISO 1600, +1 EV. 

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And below, taking off!

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Great Horned Owl


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Canon R6 with RF 100-500mm at 114mm 1/4000 sec., f/5.6, ISO 320, 0 EV. 

The most common owl in North America,  the Great Horned Owl is a large bird with a thick body, broad and rounded wings, and two feathered tufts on the head. They have excellent night vision due to large eyes with many black and white sensitive  rods in the retina which  facilitate seeing things in low light and detecting motion.  All necessary when your food supply is dependent on hunting at night.  Their eyes do not move in their sockets; rather these owls can swivel their heads 270 degrees in either direction providing a comprehensive view of their environment.  

Great Horned Owls are covered in soft feathers that keep them warm in winter and help them fly very quietly in pursuit of prey.  Since they hunt at night, and neither soar nor migrate, their feathers are designed specifically for soundless flight over short distances with good lift and maneuvering capability. Keep your eyes open; you will not hear them coming!

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Canon R6 with RF 100-500mm at 114mm 1/4000 sec., f/5.6, ISO 400, +1/3 EV. 

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Below, the owl comes in for a landing, heading for the fresh meat the trainer has put out on the branch. After placing the food and signaling the bird, the trainer ducks low keeping their head down. We can see the large talons on the owl's feet.  

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Canon R6 with RF 100-500mm at 114mm 1/4000 sec., f/5.6, ISO 400, +1/3 EV. ​

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Great Horned Owls have four toes on each foot. The image above shows the owl taking off and gives a good view of the right foot, detail below.  The outermost toe can rotate forward or backward depending on their needs in handling prey.  The cropped image below shows the 4th toe in the outer position, and I think we can see how it could rotate to create a 2 forward and 2 back, or 3 forward and 1 back option.  Most raptors have fixed anatomy with 3 toes forward, and 1 back.

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Below our owl nibbles its "prey."  I have noticed that this bird, resident of the ASDM for many years, closes its eyes when it bites down on food.  This may be a reflex behavior to protect the eyes when attacking large prey.   Note that Pileated Woodpeckers will deploy the nictitating membrane over the eye with each "hammer" of the bill to protect it from flying wood chips. (NATURE S41E3 Woodpeckers: The Hole Story).

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Great Horned Owls live among us in Tucson.  For more on two backyard visitors, an owl and a hummer from August 2020, see my post: The Owl and the Hummingbird.   

​On that day this female Great Horned Owl was either too sleepy to eat, or hummingbirds are not on her diet. Maybe she is trying to cut back!  They both survived the encounter.  
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Crested Caracara


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Canon R6 with RF 100-500mm at 186mm 1/4000 sec., f/5.6, ISO 800, +2/3 EV. 

The Crested Caracara is a very interesting bird, being a tropical vulture in the falcon family.  They live year round from South and Central America into Mexico, coming as far north as Arizona, Texas, and Florida.  The Crested Caracara is not a picky eater, consuming insects, fish, birds, and small mammals as well as carrion (dead stuff). Note the lack of feathers on the face, similar to other vultures.   To see this bird 5 years ago when he was a juvenile, see my post from 2017:  What is a Caracara, and why should I care, or, care, or, or . . .whatever....     To see this bird in the wild, see my post from 2018: Santa Cruz Flats.  

​Images below, the bird in flight on October 31, 2022.

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​For the photo geeks:  Canon R6 with RF 100-500mm lens, 114 mm, 1/4000 sec., f/5.6, ISO 640, +2/3 EV.  Post production processing in Adobe Lightroom, and Photoshop.  Full disclosure:  This otherwise great photo was compromised by a rather large gray sunhat worn by my neighbor to the left.  Although I am a big fan of UV protection, the hat did not add anything to the image, so I managed to eliminate it. Photoshop's AI program decided to replace it with an irregular desert mesa (left 1/3 of the image) that unfortunately bears no resemblance to the terrain on the museum property.   The sky replacement program cleaned up the sky.  The bird was not touched or modified in any way. 

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Crested Caracaras have dark wings on the back with white tips, a predominantly white tail with dark tips, white neck, mottled breast and black cap.  They are part time vultures, so if you see a flash of black and white on the road out in the desert, don't be surprised. 

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These birds are tough to find and photograph in the wild, as we saw at Santa Cruz Flats.  So, Raptor Free Flight is a great opportunity to see this beautiful bird up close. 

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Image below, what it is all about, eating!  The underside of the wings have a lighter appearance than the back. Look closely, and you can see his tongue bringing in his food.  Note that birds have tongues, but no teeth. Any crunching, grinding, ripping or tearing is done by the bill, usually customized to match the bird's diet.

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Harris Hawk


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Canon R6 with RF 100-500mm at 114mm 1/4000 sec., f/5.6, ISO 1250, +1 EV. ​

Harris Hawks are very social raptors of southern Arizona and Texas, as well as portions of Mexico, Central and South America.  They live and hunt together, working cooperatively to isolate prey and make the catch.  The ASDM has a number of Harris Hawks but 5 usually fly in a family group on any given day.  Above is one of them posing for a photo.  They are handsome birds with long legs and long tails, with brown/reddish brown markings, a white rump and white band across the tail. As a group they put on a great show to finish up the free flight session. 

Below is another member of the family; note the metal band on the right leg. 

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Above and below, two members of the team on branches.  Note the band on the left leg of the lower bird.  Males and females look alike, with females being larger, weighing up to twice as much as males.  Note that for all the raptors the females are larger. 

Below, one of the hawks goes after food left on the branch, with his/her wings lifted. 

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Canon R6 with RF 100-500mm at 254mm 1/4000 sec., f/5.0, ISO 2000, +1/3 EV. ​

Above, the bird with the left leg band in the air.  The characteristic tail markings are evident, as well as the dark flight wings and reddish-brown shoulders.  The leg feathers fit nicely into the bird's underside and the legs tuck in.   At one point almost all of them were circling right above us, putting on a good show. 

Below, two birds landing together going after food. 

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Canon R6 with RF 100-500mm at 100mm 1/4000 sec., f/4.5, ISO 640, +1 1/3 EV. ​

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Above, taking off for the next stop.  The reddish-brown feathers extend well down the legs, and in flight merge into the feather undercarriage, as noted in the earlier in flight image.

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Canon R6 with RF 100-500mm at 500mm 1/4000 sec., f/7.1, ISO 1000, +1/3 EV. ​

Images above and below, one of the hawks lands on a volunteer's glove at the Cat Canyon overlook.  Harris Hawk's social nature and relative ease around people make them popular with falconers.  (Reference:  All About Birds).  

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And, in closing: Not-a-raptor, Nor flying, a Lilac-crowned Parrot (!!!??)


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Canon R6 with RF 100-500mm at 176mm 1/1000 sec., f/5.0, ISO 125, - 1 1/3 EV. ​

After Free Flight as I was working my way back up to the entrance, I found a volunteer just off of the path with an ASDM resident, a Lilac-crowned Parrot, sometimes called the Lilac-Crowned Amazon.  These parrots live year round on the Pacific Slope of Mexico.  This bird has been a resident of the ASDM for some time, and today was preening, with just enough time to strike a pose for the photographers!

Many thanks to Dan Weisz for his excellent narration on Monday, and for his help reviewing this text and guidance on details about the Great Horned Owl and the Harris Hawks in the ASDM free flight family. 

That's all for now!
Happy Trails.  
More posts coming soon.

4 Comments
Charlotte
11/8/2022 08:17:46 am

What an incredible wonderful collection of shots. Thanks for the great visit to the ASDM!!

Reply
Deb Bauer
11/8/2022 02:31:48 pm

I enjoy the details of these birds with attention to description you engage in. Your images point out exactly what you are referring to and they are once in a lifetime shots at that! The talons on these raptors are both threatening and frightening, these are serious and sometimes soundless (as you describe) hunters! I appreciate the depth of information you provided us, it is obvious how deeply you enjoy the study of the raptor species. It always takes me a second-read to take in the depth of info you print, making for a pleasurable cup of coffee when doing so too. Encourage Dan to return to a meeting or two, he is another who is full of all that good stuff you have shared with us in this blog. Thanks Henry, please remain interested in your passion, it’s a huge learning benefit for me.

Reply
Henry link
11/8/2022 02:51:14 pm

Deb,
Many thanks for your comments. I am glad you like the posts. I try to go beyond the photographs with details about the bird's lives. I always feel like I am walking in their homes when I am outside, and knowing more about them adds to the experience and also makes me aware of what we need do to help them survive in a changing environment.
Henry

Reply
Carol Niehoff
11/21/2022 07:11:41 pm

What a wonderful journey to the Raptor Show! Perfectly narrated, Henry! Thank you for the most enjoyable moments of reading, learning and discovery.

Reply



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    • Sulfur-bellied Flycatcher
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    • Vermilion Flycatcher
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