Our local wildlife rehabbers Jodi Swenson and Erin Hutchings (CAPE ANN WILDLIFE) are on the front lines of trying to save our raptors from rodenticide poisoning. They have treated three juvenile Red-tailed hawks just this week alone. Two perished and a third is barely hanging on. Tufts does necropsies on all dead raptors-98 percent have rat poison in their system. Please see previous post about safer alternatives to the new second-generation deadly poisonous rodenticides.
Recently we shared a story from the Snowy Owl Project that this year Snowy Owls have remained in Massachusetts throughout the summer. We also posted about eight cases of Snowy Owl deaths by rat poison, in Massachusetts, which has been documented during the present Snowy Owl irruption of 2017-2018. Buried in the post was a link to an article from Audubon, “Poisons Used to Kill Rodents Have Safer Alternatives,” which is about alternatives to the new second-generation rodenticide that is killing our native predator population. These are the very birds and animals that we want to support because they eat rats and mice. This is not an abstract problem; Cape Ann Wildlife rehabbers Jodi Swenson and Erin Hutchings are caring for almost daily dying wildlife that has been poisoned to death by second-generation rodenticide, and the problem is mushrooming. Second-generation rodenticides also kill pet dogs and cats!
Jodi and Erin recently shared the above photo of a juvenile Red-tailed Hawk they had been treating for rodenticide poisoning, which tragically did not make it. These birds are victims of second-generation anticoagulant rodenticides used by exterminators, businesses, farmers, and homeowners.
The brand names are Havoc, Talon, Generation, d-Con, and Hot Shot. Do not buy these products because they contain the deadly indgredients brodifacoum, bromadiolone, difethialone, and difenacoum.
“Both first- and second-generation rodenticides prevent blood from clotting by inhibiting vitamin K, though the second-generation products build to higher concentrations in rodents and are therefore more lethal to anything that eats them.
What makes second-generation rodenticides so non-selective is that they kill slowly, so rodents keep eating them long after they’ve ingested a lethal dose. By the time they expire, or are about to, they contain many times the lethal dose and are therefore deadly to predators, scavengers, and pets.
There’s no safe place or safe delivery system for second-generation rodenticides. After a rodent partakes, it stumbles around for three to four days, displaying itself as an especially tempting meal not just for raptors but for mammalian predators, including red foxes, gray foxes, endangered San Joaquin kit foxes, swift foxes, coyotes, wolves, raccoons, black bears, skunks, badgers, mountain lions, bobcats, fishers, dogs, and house cats—all of which suffer lethal and sublethal secondary poisoning from eating rodents. Deer, non-target rodents, waterfowl, waterbirds, shorebirds, songbirds, and children suffer lethal and sublethal poisoning from eating bait directly.”
Here in a nutshell are alternatives to second generation rat poison. Please read the complete article, which goes in to much greater detail to better understand why this is happening, which companies are responsible for creating the toxic poison, which companies are taking it upon themselves to ban second-generation rodenticides (Walgreens, yes, Home Depot, no), and how you can help.
- Prevent a rodent infestation by keeping waste in tightly covered garbage pails and compost bins.
- RATS! (Raptors are the Solution) – a national alliance of citizens, nonprofit groups, and local governments that educates consumers and municipalities about safe methods of rodent control and the dangers of second-generation poisons. MASS-RATS is the newly formed state chapter of RATS.
- . Hungry Owl Project – delivers safe, effective rodenticide in the form of Barn Owls! This organization also advocate for other predators—coyotes, foxes, mountain lions, badgers, skunks, bobcats, raccoons, opossum.
- When natural rodent control is not possible in urban areas: single- and multiple-entrance snap traps, electrocuting traps, glue traps (provided you use them only indoors and frequently dispatch stuck rodents), and even first-generation baits with these active ingredients: chlorophacinone, diphacinone, diphacinone sodium salt, war-farin, and warfarin sodium salt.
- The “Better Mouse Trap” – Take a metal rod, run it through holes drilled in the center of both lids of an emptied tin soup can so the can becomes a spinning drum. Fasten both ends of the rod to the top of a plastic bucket via drilled holes. Coat the can with peanut butter, and fill the bucket with water and a shot of liquid soap (to break the surface tension and thus facilitate quicker, more humane drowning). Mice and rats jump onto the can, and it spins them into the water.
On Tuesday this past week my friend Deborah and I attended the Coastal Waterbird Conservation Cooperators meeting, which took place at Cape Cod Community College in Barnstable. The meeting is held annually to bring together people and organizations that are involved with population monitoring and conservation efforts on behalf of coastal waterbirds. Threatened and endangered species such as Least Terns, Piping Plovers, and American Oystercatchers are given the greatest attention, while the meeting also encompasses efforts on behalf of heron, cormorant, and egret species.
Conservationists from all seven Massachusetts coastal regions participated, as well as conservationists from nearby states, including representatives from New Jersey, Maine, Rhode Island, and New Hampshire. To name just some of the organizations presenting at the meeting-Mass Wildlife, Trustees of Reservations, Massachusetts Department of Conservation and Recreation (DCR), and US Fish and Wildlife. Gloucester was well represented. In addition to Deborah and myself, two members of the Animal Advisory Committee also attended; chairperson Alicia Pensarosa and former animal control officer Diane Corliss. Many of you may remember our Mass Wildlife Piping Plover intern Jasmine. She was there to give a presentation on habitat vegetation utilized by nesting Piping Plovers. Her aunt, Gloucester’s Terry Weber, was there to support Jasmine. This was Jasmine’s first time speaking in public and she did an excellent job!
Each region gave the 2018 population census report for nesting birds as well as providing information about problems and solutions. We all share similar challenges with predation from crows and gulls, uncontrolled dogs, enforcement, and habitat loss and it was very interesting to learn about how neighboring communities are managing problems and issues.
Just one highlight of a day filled with helpful insights and useful information is that we can be very proud of our state—Massachusetts is at the leading edge of the Piping Plover recovery effort. The representative from New Jersey was there specifically to learn from Massachusetts conservationists on how they could possibly improve their recovery program as the New Jersey PiPl population is not growing, with fewer and fewer each year retuning to nest. As you can see from the graph provided at the meeting, the Canadian recovery is going very poorly as well.
Readers will be interested to know that our region’s Crane Beach continues to have one of their best year’s ever. Trustees of Reservations Jeff Denoncour shared information on the latest census data from 2018 and Crane’s has a whopping 76 fledglings, with 25 more chicks still yet to fledge. Because of the huge success at Cranes Beach, the northeast region, of which we are a part, has fledged a total 136 of chicks in 2018, compared to 108 in 2017, and as I said, with more fledglings still to come! The northeast region encompasses Salisbury Beach to the Boston Harbor Islands.
Jeff noted that this year they had less predation by Great Horned Owls. Because of owl predation, several years ago Crane Beach gave up on the wire exclosures and now use electric fencing extensively. The Great Horned Owls learned that the Piping Plover adults were going in an out of the exclosures and began perching on the edge of the wire, picking off the adults as they were entering and exiting the exclosure.
Crane has an excellent crew of Trustees staff monitoring the Least Terns and Piping Plovers, as well as excellent enforcement by highly trained police officers. No dogs are allowed on Crane Beach during nesting season and dogs are prevented from entering at the guarded gate. As we saw from one of the graphics presented about nesting Double-crested Cormorants, when a dog runs through a nesting area, the adults leave the nest, temporarily leaving the eggs and chicks vulnerable to predation by crows, gulls, raptors, and owls.
Compare the Least Tern to the Common Tern in the above photo. It’s easy to see why the birds are called Least Terns; they are North America’s smallest member of the tern and gull family (Crane Beach).
Another interesting bit of information shared–if you listen to our podcasts, back in April, we talked about the potential dilemma of what would happen if Snowy Owls remained on the beaches as the Piping Plovers returned from their winter grounds. Knowing that Snowy Owls (Bubo scandiacus) and Great Horned Owls (Bubo virginianus) are close cousins and that the Great Horned Owl eats Piping Plover chicks and adults, I was concerned that a Snowy might eat our PiPl. At one particular beach on Cape Cod, a Snowy stayed through mid-July. An adult Piping Plover skull was found in the owl’s pellet.
After attending the cooperators meeting, I am more hopeful than ever that our community can come together and solve the problems that are preventing our PiPl from successfully nesting and fledging chicks. What we have going in our favor is the sheer number of amazing super volunteers along with strong community-wide support.
With thanks and gratitude to Bob and Doug Ryan from Ryan and Wood Distilleries. Bob emailed yesterday afternoon that a Snowy Owl was being dive bombed by crows and gulls. I raced over and she had tucked in under the rocks at the base of a tree.
I took several photos and footage, and just as I had packed up to go, she flew to a large boulder. Immediately, within thirty seconds, a noisy flock of gulls were harassing her from overhead once again, and a few crows dove at her. She then flew to the nearest building. The crows and gulls pestered her for another fifteen minutes, while she quietly perched.
To write “return” is not entirely accurate. She was probably here all along. As soon as work began on the Atlantic Road hotel roofs, we no longer saw her at the back shore. I thought Hedwig might still be here last month, but wasn’t positive, and then Alicia wrote to say she had seen a Snowy and thought it could possibly be Hedwig. It was difficult to confirm without looking at closeups from a long lens. I searched around Alicia’s location for several days but could not find.
Considering most Snowies have left Massachusetts by April, it’s wonderful to have a record of her here in Gloucester in early May. I am elated, and grateful, to Bob and Doug for the call, because now we have footage of her in a rocky woodland Cape Ann setting! Thank you, thank you!
For the next two weeks, I am offering a limited edition of the photo “We Love You Too Snowy Owl.” The 8 x 12 photo will be printed on fine art hot press paper and signed. At the end of two weeks, after orders are in and checks received, I will place the order with the printer. The $95.00 price includes shipping and tax. If you would like to purchase a photo of Hedwig, please email me at firstname.lastname@example.org Thank you!
Norman Smith from Mass Audubon has done more to save Snowy Owls and bring awareness to this beautiful and at risk species than any other person nationwide. Since 1981 he has been at the forefront of Snowy Owl conservation and his Project SNOWstorm has become a model for saving and studying Snowy Owls around the country.
Several weeks ago I was up north for my short film about Hedwig and came upon a Snowy Owl in the marsh. With very similar feather patterning around the face, I think she is the same Snowy that was released in the video!
Our beautiful Snowy Owl Hedwig was last seen on Monday night, March 12th. This was also the night before the third nor’easter. She was perched on the railing of the Ocean House Inn facing towards the sea. The wind was blowing fiercely. Well after dark, and after making several attempts, she successfully flew in a southerly direction out over the water.
It has been two weeks since that last sighting and perhaps we will see her again, but I imagine her to be safe and undertaking her return journey to the Arctic tundra, well-fed from her stay on Cape Ann. Whether she was well-rested is another story. The great majority of people who came to see this most approachable of owls were respectful and considerate of her quiet space. The crows however, were nothing short of brutal. After learning about why crows attack owls, and the degree of aggression possible, I am surprised she lasted as long as she did, and without great injury.
Crows and owls are natural enemies because a murder of crows may mob an owl to death (or any raptor by which it feels threatened) and owls occasionally eat crows. Crows are diurnal, which means they feed during the day. The majority of North American owl species that they encounter are nocturnal (night feeding). In the case of Snowy Owls, which feed both day and night, their paths may occasionally cross, as happened when Hedwig moved into the crow’s territory along Gloucester’s Atlantic Road.
A flock of American Crows can run circles around most owls, pecking, dive bombing, chasing, and in some instances killing. Snowy Owls are the exception; they are larger, stronger, and faster flyers than other North American owl species. And too, Snowy Owls are closely related to Great Horned Owls, a species known to eat crows when they are roosting overnight. So even though a crow in our area may never before have encountered a Snowy Owl, they instinctively know danger is present.
With their incredible ability for recollection, crows are considered the brainiacs of the bird world. Daily, Hedwig outsmarted this smartest of bird species. She learned to stay well-hidden during the daylight hours, laying low atop the hotel roofs. Her salt and pepper coloring blended perfectly with the black, white, and gray colors of industrial roof venting equipment. She adapted to hunting strictly at night, after the crows had settled in for the evening, returning to her hideouts before the day began.
On one hand it would be fascinating if Hedwig had been outfitted with a tracking device. On the other, if she had been trapped for tagging, she may not return to this area. There is some evidence that Snowies occasionally return to an overwintering location. Next winter I’ll be taking more than a few peeks in the location of the Atlantis and Ocean House Inn Hotels to see if Hedwig has returned.