When Birds Collide with Windows

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By Denys Hemen, Hospital Manager

Western Scrub Jays are often victims of window strikes
Photo by Alyssa Schlange

It’s a sight–and sound– sure to startle anyone who is a witness; you look up to see a bird hit your window, and immediately run outside to check on the welfare of the unfortunate creature. An estimated billion birds die from window stricks annually in the U.S. alone. Along with attacks by outdoor cats, window strikes are among the leading causes of the steep population decline seen in almost every species of songbird.

Birds collide with windows because they do not see them as solid structures and try to fly through them. Even small windows can be a problem because birds often look for narrow escape routes when being chased by predators. A bird may also fly into glass because a building’s surrounding vegetation is reflected onto the surface of the windows, or there is vegetation inside that the bird can see and attempts to fly into it. Glass walls installed around properties and on balconies are especially troublesome for birds.

California Wildlife Center receives dozens of birds each year with eye, head, and shoulder trauma from window collisions. Although the cause for much of this trauma is unknown, there were 65 patients last year brought to CWC because a rescuer had seen or heard the window strike. Not all birds are fortunate enough to recover from window strikes. Most are taken by predators while in a stunned state, and others may stumble off and perish while hidden from view.

If you have windows that birds are drawn to, there are a few options to prevent collisions. By far the easiest remedy available is bird tape. This reflective tape gives the window an appearance that resembles a solid structure. Other options available are “bird-proof” glass and adhesive films that can be applied to give the window the appearance of impermeability. Please remember always to keep bird feeders away from your windows.

If you witness a bird striking a window, there are a few things you can do to help. Quickly find a box suitable for the bird’s size that can be closed. Place something soft in the bottom, such as an old t-shirt or a towel, and puncture the box several times to provide adequate ventilation. Gently pick up the bird using your hands and quickly place the bird in the box, closing it immediately. If it is a larger bird, you may cover it with a towel when you pick it up to aid in its capture and to protect you from a bite. For birds of prey, such as hawks or owls, never attempt to pick them up with bare hands. Turn your box sideways and try to push the bird into the box using a broom or similar tool. For larger birds or birds of prey, keep the bird somewhere dark and quiet and call CWC at (310) 458-WILD. If it is a small songbird that struck your window, you can bring the bird inside to a quiet room for two hours. After that time, go outside and open the box. Sometimes the bird is only stunned and needs a little time to recuperate in a safe place. In this case, the lucky bird will fly out of the box and your work is done! If the bird is unable to fly or stand after this time, please contact CWC immediately.

 

Owl Rescued from Soccer Net

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by Jennifer Brent, Executive Director

Owl in soccer net, Photo by Fernando Romero

The day after Christmas we received an urgent call from the folks over at Chaminade College Prep in West Hills. They had found a Great Horned Owl caught in their soccer net. Students started to cut him free but were concerned about handling the owl. We were able to send Heather Henderson from the Marine Mammal rescue team to try to rescue the trapped bird. Throughout the rescue, the owl was calm and relaxed, but once she was completely separated from the netting, she regained her normally wild demeanor.

Heather transferred her to our hospital for our vet to check for injuries.  The owl had suffered abrasions to a few toes on her left foot and perhaps a minor injury to her wing.  X-rays revealed no actual signs of breakage, and she was confined to cage rest for a few days because of the duration and extent of her entanglement in the netting.

Owl being examined by CWC staff, Photo by Jennifer Brent

We did a test flight with the owl in one of our fully enclosed outdoor flight pens, and she soared! Volunteer Corby Sandberg, who brought the Great Horned Owl back to West Hills for release, said, “It was an uplifting experience…carrying the box with the owl in it felt light as a feather. When I opened the box and tipped it on its side – after some long pauses and curious wide-eyed looks around, it didn’t walk out, it swooped out without even a running start!”

Thanks again to the alert and caring students at Chaminade and to our volunteers who are able to assist with returning these wild creatures back where they belong.

CWC’s Gull Patients: An Earful

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by Melissa Hartman, Administrative Assistant

Heermann’s Gull, Photo by Jamie Pelayo

Of the animal patients we see at CWC, the gull is not the most universally well-regarded. Say the word seagulls to the average person, and you may elicit revulsion. Or indifference. Or resignation, as in, I should have known better than to leave my kale chips unattended while I took that dip in the surf.

Or you may get a blank stare followed by this clapback: Dude, there are, like, no actual birds known as seagulls!

Say…what?

It may or may not surprise those born before the “Me Decade” of the 1970s that one of the era’s bestsellers was, of all things, a moral fable about a philosophical gull intent on seeking a higher purpose in life. The book’s effect on, like, actual enlightenment is a discussion fit for another forum; however, Jonathan Livingston Seagull practically assured that the moniker “seagull” is pretty much used describe any of the 44 types of gull species found worldwide, including twenty-eight types of gull species found in North America.

Fortunately, the concerned members of the public who alerted us to the circumstances of the 93 gull patients seen in 2017 were free from any such prejudices, pedantic or philosophical, and wanted to do all they could on behalf of these birds!

Of the seven species seen last year at CWC, 68 were Western Gulls, nineteen were California Gulls, and the rest were the locally-less-populous species of Bonaparte’s, Heermann’s, Herring, Ring-billed and Sabine’s Gulls. These birds were admitted for a variety of reasons: broken bones, fishing line and other plastic entanglements, oiling, pellet shot.         While some presented with injuries too complex or too old to allow for rehabilitation, approximately half were transferred after treatment to a partner agency, San Pedro’s International Bird Rescue, to continue their journey of healing. We are grateful to those area residents who cared enough to bring our attention to these patients who needed our help!

Avian Conservation in Australia: Doing it Right

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by Jennifer Brent, Executive Directors

Black Noddy, Photo by Jennifer Brent

During our recent slow season, I was fortunate to be able to spend a week at Heron Island in the Great Barrier Reef. As well as being a nesting spot for Loggerhead and Green Turtles, Heron Island is home to a wide variety of bird species. At certain points in the year, as many as 100,000 birds can be found on this tiny 72-acre island.  The sight, sound and smell of so many birds was amazing—even for someone used to seeing birds close up.  Egrets, gulls, sea eagles, doves, rails, terns, cormorants, cuckoos and, of course, herons are all over the island and easily viewed.

In December when I was there, the black noddy was nesting. There seemed to be thousands in the trees, creating unique nests made of leaves in every nook and cranny of every Pisonia Grandis tree. This tree, also known as the “Grand Devil’s-Claws” has sticky berries that grow at the same time as the birds are nesting.

As well as providing a nesting spot for the birds, the tree was also the birds’ mortal enemy. Every day, we would see black noddies covered with berries and sticks from the tree. The noddies would start with just a few sticks, and then grounded, quickly be covered with the sticky substances from the tree. Unable to pull them off, the birds quickly perished from starvation and their bodies littered the island floor. We were cautioned by the naturalists on the island to not interfere with the wildlife and the natural cycle of life where we were the interlopers.

Victims of the Pisonia Grandis Tree, Photo by Jennifer Brent

Seeing the visitors’ respect for the animals and the instructions of the naturalists on island was truly impressive. There was only one occasion when humans interfered with animals–a nesting female Loggerhead Turtle had gotten lost and swum into the salt water pool instead of the ocean, 50 feet away.  She was quickly relocated back to the sand.

The reverence and respect that Australians show to their native animals is unlike anything I’ve seen elsewhere in the world. They have seen first-hand the devastation caused by the introduction of non-native species on their flora and fauna and want to preserve their natural habitat as much as possible.

 

Justice Served

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By Denys Hemen, Hospital Manager

X-Ray of Hawk with Bullet

At CWC we have received 36 patients so far this year that have been shot by a pellet, BB, or shotgun. Last year we received 51. In all of these cases the perpetrator was never known and most of the patients had to be euthanized. The animals were found by caring members of the public, unable to fly or crawl away.  Most of these people had no idea that the animals had been shot and were very shocked to find out when they followed up with us over the phone. This can be a very frustrating situation for us and the public. We know there are multiple people in Los Angeles and the surrounding areas shooting wildlife, but we are helpless to address the situation without evidence. One day recently, that all changed.

A hawk was brought into our exam room unable to stand or fly. As we do with all our patients, CWC staff gathered important information from the rescuer. The rescuer told us how he found the hawk in his backyard and that he believed it was shot. He stated that he knew someone in his neighborhood that he had seen shooting birds. We quizzed him and made sure he had seen the gun in the person’s hand actively pointing at birds and firing.  X-rays confirmed that the bird had pellet fragments inside it’s body. Finally, that helpless feeling began to go away. We gave the rescuer the contact information for the proper authorities. Then we followed up with the same department. We gave the rescuer’s contact information to the officer and by the next day they had contacted them. An officer arrived at the scene later that week and questioned the perpetrator who immediately admitted to the shooting. Justice had been served. Not only for the hawk but also for the numerous other birds this person had illegally shot.

Shooting nongame migratory birds is a federal offense and a state offense in California with fines that can reach into the thousands of dollars. This story proves that we are not always helpless when trying to protect our wildlife from poachers. Sometimes it pays off to be persistent. If we have proof, then the law is on our side. Even though our California State Park and California Department of Fish and Game departments are underfunded and understaffed, there are eager individuals who are passionate about our wildlife and are willing to serve justice. If you ever witness a person shooting non-game wildlife or shooting any wildlife in the city limits, please call the CalTIP line at 888-334-CALTIP or visit the website at www.wildlife.ca.gov/enforcement/caltip.

Orphan Care Unit 2017 Wrap Up

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By Jennifer Guess, Senior Wildlife Technician

Eastern Fox Squirrel
By Anne Slattery

November marks the end of baby season at California Wildlife Center (CWC).  It was another year full of energetic squirrels, curious crows, grumpy mockingbirds, and aggressive woodpeckers.  This year we had quite a busy season.  CWC took in over 275 Eastern Fox Squirrels and over 85 Virginia Opossums between the spring and fall months.  Throughout the height of summer we saw over 200 American Crows, Common Ravens and Western Scrub-jays, over 300 Mourning Doves and Band-tailed Pigeons, and 135 Northern Mockingbirds.  We also had a few unique patients come through our doors.  Many volunteers working in our Orphan Care Unit have fond memories of feeding our one and only Pacific-slope Flycatcher or a few of our Western Bluebirds.  Even more volunteers will remember building up the courage to feed our lively Acorn Woodpeckers.

Nestling Northern Mockingbirds
By Alyssa Schlange

We’d like to thank all our fantastic Orphan Care volunteers for their tireless work and dedication in helping us feed and care for the almost 1,500 young patients that came through our doors for this season.  We’d also like to thank our wonderful transport team who helped bring almost 300 young patients from shelters across the Los Angeles area.  We are so fortunate to have an amazing group of people committed to helping injured, sick and orphaned wildlife.

I’m sure we are all looking forward to taking a deep breath and relaxing a little during the relatively calm winter months.  But, don’t get too comfortable; spring will be here before you know it!

Operation Hummer: The Not-So-Tiny World of Hummingbird Care at CWC

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By Melissa Hartman, Administrative Assistant

Allen’s Hummingbird
Photo by Jamie Pelayo

So far this year at California Wildlife Center, the Allen’s Hummingbird is in our “Top Ten” list, meaning it is among the ten most frequent species of the 4,000 animal patients who began their journey to healing up our steep driveway framed by fragrant pine and oak trees.

It’s interesting to note that the Allen’s Hummingbird, this year one of every 12 CWC clients, was relatively unknown south of Ventura County fifty years ago.

The hummingbird delights and perplexes. Poet Richard Burton cuts to the observer’s heart of the matter by asking “Is it a monster bee/Or is it a midget bird?” The hummingbird’s astounding aeronautics and spectacular plumage figure prominently in the cultures of indigenous people of both North and South America, both ancient and contemporary.

According to the Hummingbird Society (hummingbirdsociety.org), a Sedona, AZ-based educational and conservation nonprofit, here are the essential facts to know about these bejeweled stunt flyers:

  • Of the 338 known species, 16 breed in the United States
  • They are found only in the Americas
  • It’s illegal to possess a hummingbird, feather, nest or any part of it without a permit
  • Do not care for an injured or baby hummingbird without a licensed wildlife rehabilitator

In addition, some of the “fun facts” to know about the Hummingbird:

  • Iridescent colors of the male’s gorget (throat) are actually caused by light refraction
  • A unique figure-8 wing rotation allows forward, backward, sideways and straight up flight, as well as extensive hovering
  • Up to 90 percent of flying time is spent hovering to feed
  • They eat about 3 times their body weight per day
  • Their average weight is less than a nickel

If you find a hummingbird in need of our help, line a small box with crumpled tissue. Make air holes. Gently pick up the hummingbird by the body and place it in the box. Place it in a quiet, dark location until you reach hospital staff.

Bonus question for the true hummingbird aficionada/o: What is a group of hummingbirds called?

A. A Charm

Exercising Raptors Back to Health

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By Jennifer Guess, Senior Wildlife Technician

Photos by Jenn Guess

Here at California Wildlife Center (CWC) we see a lot of raptors with severe injuries that require many weeks even months of rehabilitation. The raptor family includes all types of hawks and owls. As the birds heal inside the ICU they do not get the daily exercise they would receive in the wild. Due to most raptors lengthy recuperation period, the vast majority need to be exercised at the end of the rehabilitation process to build up flight muscles before they can be released back into the wild.

When a raptor reaches the point in his recovery plan where he is stable and in good body condition he can be moved into one of our large outside aviaries. Raptors fly many miles every day and it is difficult to provide enough space in an enclosure where a bird can get adequate exercise on his own. One method of exercising raptors is to encourage them to fly from one end of the enclosure to the other. The drawbacks of this method is that it can be stressful on newer patients sharing the large flight aviary, and on patients in nearby flight aviaries. Plus, most birds learn very quickly how to navigate the enclosure with as little exertion as possible.

At CWC we use a method of exercising called creancing. During creancing the raptor is caught up from the outside aviary. A hood is placed over the head and eyes to reduce the stress level of the bird. Leather anklets are attached to the bird’s legs, above the feet. The bird is then transported to a nearby open

field. Leather strips, called jesses, are fed through the anklets and hang down below the bird’s feet. A light weight line with a weighted tube is connected to the jesses.

When everything is ready to go, the hood is removed and the bird is let go and he takes flight. He flies across the field and when he reaches the end of the line the weight in the tube starts to add resistance. As the bird drags the weight, he quickly tires out and lands on the ground.

It is important to do a lot of prep work before creancing a raptor. The weight of the tube must be adjusted depending on the weight of the patient. If the tube is too heavy, it could cause injury to the bird when he reaches the end of the line. If the tube is too light, the bird might be able to fly further than expected and into an obstacle like a nearby tree. The line must also be carefully measured before each creancing session. It should be long enough so the patient can gain lift and propel forward before feeling the weight of the tube but it should not be so long that the patient can reach obstacles.

During the flight, important information is being collected. The majority of our creancing is performed by Malibu resident and longtime CWC volunteer, Diana Mullen. She takes careful note of how far each patient flies, how much lift they are able to obtain, whether the wings are symmetrical during flight, and how quickly the bird tires out. She works very closely with our veterinarian, Dr. Duane Tom, and knows the history of each patient before taking them out for creancing. It is important to not push the patient too hard. Sometimes a single flight is enough for a creancing session. Depending on the patient, a bird might have three or four flights in a session. Each piece of information is carefully recorded in the patient’s record so Dr. Tom can adjust their individual plans. Volunteers are able to assist Diana during these creancing tests and all agree that seeing the raptors soar into the air serves as an excellent reminder of why we do the hard work of rehabilitation for these beautiful animals.

Crow Feather Imping

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By Alyssa Schlange, Volunteer and Outreach Manager

Crow 1476 after release. Photo by Alyssa Schlange

His tail after having broken feathers replaced. Photo by Alyssa Schlange

The donor feather is inserted into the shaft of the original feather.
Photo by Alyssa Schlange

American Crow number 1476, came to us on May 13th of this year as an orphan with terrible feather quality, suggesting malnutrition due to abandonment. After three weeks of consistent care and steady weight gain the crow was still not able to fly. Dr. Duane Tom, Director of Animal Care, ascertained that the crow would need the full set of wing primary feathers to be replaced, or imped, and possibly full tail primary feathers as well.

Imping is when we take feathers from a deceased patient with good feather quality and insert them into the feather shafts of the living patient under anesthesia. We remove the patient’s bad or broken feathers and glue the new feathers in, which improves the bird’s flight quality. It allows the birds to maintain muscle tone and flight ability while recovering, better preparing them for release when other injuries are healed. Imping is a life-saving but complex procedure, as the donor feather must match the recipient in age, size, and sex. The feathers are carefully inserted at particular angles so that it mimics the degrees of the original feathers that allow the birds to soar.

On June 5th Dr. Tom and his team of preceptors (fourth year veterinary students) imped the crow’s wings in a procedure that took over 2 hours. While 1476’s flight did improve, he was unable to fly directly to the highest perch so it was decided that we also needed to imp the tail feathers so that he could get more lift in his flight. On July 11th, we imped the remaining tail feathers.

After a few days in the enclosure he was okayed to be released. On July 14th, after being in care for 61 days, he re-entered the wild with 14 other juvenile orphaned crows.

West Nile Virus in CWC’s American Patients

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Photo by Alyssa Schlange

By Melissa Hartman, Administrative Assistant

Of all the American Crow patients we see, 15% carry the disease.

In 2016, California Wildlife Center admitted 238 local American crows for a variety of reasons—chicks apparently abandoned by their parents, fledglings fallen out of a nest too high to allow them to be replaced, adults suffering from broken limbs and open wounds. But more than 40 of these birds came into our Center with troubling symptoms including a lack of balance both at rest and while mobile, weakness, lethargy, even seizures. West Nile Virus—WNV—is listed as the cause of death on 37 of these medical records.

WNV has hit American Crows particularly hard. In the summer of 1999, the disease first appeared in New York City, where a dead crow at the Bronx Zoo foreshadowed what was soon to come. Within four months, tens of thousands of crows perished over the tri-state area. Tests conducted indicated that for this sleek, intelligent bird, the disease was 100-percent fatal. Many other species, from jays to sparrows to finches, also proved susceptible. Within five years, WNV had spread to the Bay Area leaving millions of birds dead in its wake.

Here at CWC we see a significant population presenting with the telling neurological signs of WNV: limb weakness, head twitching, and paralysis. Our treatment is supportive care.  We use anti-inflammatory medications and maintain their nutritional requirements. Mild cases may recover but sadly severe cases seldom do. Those that recover reportedly are immune to future infections by the virus.

WNV At-A-Glance

  • West Nile Virus can be fatal to humans; less than 1% of those infected
  • However, 80% of infected people will not show any symptoms
  • Flu-like symptoms mainly transmitted through mosquito bites, not through other animals
  • Primarily affects birds, but also bats, horses, cats, dogs, chipmunks, skunks, squirrels, rabbits
  • Vaccines are available for horses but not for people

You Can PREVENT WNV

Standing water is the culprit. Reduce the number of mosquitoes around your home by emptying water from gardening containers, buckets, gutters, pool covers, pet water dishes and birdbaths. Monitor sprinkler runoff as well. The most effective way to AVOID WNV is to prevent mosquito bites:

  • Use insect repellents
  • Wear long sleeves and pants from dusk through dawn
  • Install or repair screens

You can help us reduce the number of American Crow admissions by clearing standing water. Make sure in the coming months when mosquito activity is high, you stay safe in the outdoors and have fun!