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Forensic tracking of coyotes aids in removal of food subsidies
“Forensic tracking” is a term coined by Dr. Numi Mitchell of the Narragansett Bay Coyote Study (NBCS) to describe the use of high-tech GPS collars to plot the movements of coyotes and uncover the food sources that may be serving as attractants. NBCS has been studying coyote activity on Aquidneck Island over the past decade in order to better understand factors influencing coyote population size and human-coyote interactions. NBCS tracking data has shown that human behavior, especially in the form of intentional or unintentional feeding, has been a major contributor to the rapid expansion of coyote populations on Aquidneck Island and is often responsible for human-coyote conflict.
In 2013, NBCS joined forces with the Potter League for Animals, the Norman Bird Sanctuary, the Aquidneck Land Trust, and the Rhode Island Natural History Survey to launch CoyoteSmarts, a public information initiative whose mission is to raise public awareness of coyotes, promote public and pet safety, and encourage best coyote management practices. While the initiative has helped spread the word about the no-feeding ordinances and the reasons behind them, enforcement has often proved to be a challenge.
In response to increased coyote activity and complaints in several island neighborhoods—and the lack of recent data on the island’s coyote packs—the CoyoteSmarts partners authorized the purchase of three new high-tech collars for both research and forensic tracking, which NBCS is providing as a community service to local municipalities. The new collars employ state-of-the-art GPS and cell phone technology that can be programmed to report at intervals as short as one minute, making them ideal for pinpointing food sources that may be serving as coyote attractants. All three of the island’s police departments were informed of the purchase and asked to provide their coyote complaint records to help determine the best locations for collar deployment.
One particular neighborhood north of the Sachuest National Wildlife Refuge in Middletown appeared to be a major hotspot, so the first coyote was trapped and collared in that area. The resultant tracking data provided irrefutable evidence of food subsidies being provided to coyotes at a local farm with pigs. Unprotected feed was attracting coyotes, which had to cross through residential neighborhoods to get to it. This food source, 300 feet from a neighborhood, created a hub of coyote activity, numerous coyote complaints, and an increased chance of unprotected-pet mortality. The farmer, who was unaware of the problems he was causing for his neighbors, agreed to feed his pigs in a way that does not attract coyotes and has come up with a plan for the changes he intends to make.
Farms are often a source of food subsidies for coyotes, not only because of livestock feed but also the animals themselves. If not properly housed, particularly at night, small livestock such as poultry and sheep can be highly vulnerable to coyote attacks. And larger livestock carcasses, if not properly disposed of, can sustain a coyote pack for weeks.
The tracking also turned up another food source very popular with coyotes—a community composting operation. Its managers were notified about the problem and have agreed to address it by burying food scraps under at least two feet of loam and by monitoring the site for further signs of coyote excavation.
In nearby Newport, another forensic tracking coyote revealed regular coyote traffic at the Fort Adams and Kings Beach boat ramps. The old habit of cleaning fish at the ramp and leaving the remains in the shallows was teaching coyotes to stop by every night in search of the evening meal.
Sometimes the culprit isn’t a person but Mother Nature herself. Such was the case with a seal carcass that had washed up on one of the beaches and become a coyote attractant. Tracking data uncovered the problem and also led to its source.
Encouraged by Middletown’s success with the use of forensic tracking, the neighboring town of Portsmouth has purchased its own high-tech collar, which NBCS has agreed to deploy and monitor.
“For our research and forensic tracking, the collars are ideal.” says Dr. Mitchell of NBCS. “We are able to identify significant food resources by generating a line between successive GPS points and looking for multiple travel vectors converging on an area. Essentially, we’re following the ‘breadcrumb trails’ left by coyotes as they frequent their favorite dining spots.”
(See related story: Two collared coyotes reveal where they are fed in Middletown)“
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Forensic tracking is a term coined by Dr. Numi Mitchell of the Narragansett Bay Coyote Study (NBCS) to describe the use of high-tech GPS collars to plot the movements of coyotes and uncover the food sources that may be serving as attractants. NBCS has been studying coyote activity on Aquidneck Island over the past decade in order to better understand factors influencing coyote population size and human-coyote interactions. NBCS tracking data has shown that human behavior, especially in the form of intentional or unintentional feeding, has been a major contributor to the rapid expansion of coyote populations on Aquidneck Island and is often responsible for human-coyote conflict. In 2013, NBCS joined forces with the Potter League for Animals, the Norman Bird Sanctuary, the Aquidneck Land Trust, and the Rhode Island Natural History Survey to launch CoyoteSmarts, a public information initiative whose mission is to raise public awareness of coyotes, promote public and pet safety, and encourage best coyote management practices.
While the initiative has helped spread the word about the no-feeding ordinances and the reasons behind them, enforcement has often proved to be a challenge. In response to increased coyote activity and complaints in several island neighborhoods—and the lack of recent data on the island’s coyote packs—the CoyoteSmarts partners authorized the purchase of three new high-tech collars for both research and forensic tracking, which NBCS is providing as a community service to local municipalities. The new collars employ state-of-the-art GPS and cell phone technology that can be programmed to report at intervals as short as one minute, making them ideal for pinpointing food sources that may be serving as coyote attractants. All three of the island’s police departments were informed of the purchase and asked to provide their coyote complaint records to help determine the best locations for collar deployment.
One particular neighborhood north of the Sachuest National Wildlife Refuge in Middletown appeared to be a major hotspot, so the first coyote was trapped and collared in that area. The resultant tracking data provided irrefutable evidence of food subsidies being provided to coyotes at a local farm with pigs. Unprotected feed was attracting coyotes, which had to cross through residential neighborhoods to get to it. This food source, 300 feet from a neighborhood, created a hub of coyote activity, numerous coyote complaints, and an increased chance of unprotected-pet mortality. The farmer, who was unaware of the problems he was causing for his neighbors, agreed to feed his pigs in a way that does not attract coyotes and has come up with a plan for the changes he intends to make.
Farms are often a source of food subsidies for coyotes, not only because of livestock feed but also the animals themselves. If not properly housed, particularly at night, small livestock such as poultry and sheep can be highly vulnerable to coyote attacks. And larger livestock carcasses, if not properly disposed of, can sustain a coyote pack for weeks.
The tracking also turned up another food source very popular with coyotes—a community composting operation. Its managers were notified about the problem and have agreed to address it by burying food scraps under at least two feet of loam and by monitoring the site for further signs of coyote excavation.
In nearby Newport, another forensic tracking coyote revealed regular coyote traffic at the Fort Adams and Kings Beach boat ramps. The old habit of cleaning fish at the ramp and leaving the remains in the shallows was teaching coyotes to stop by every night in search of the evening meal.
Sometimes the culprit isn’t a person but Mother Nature herself. Such was the case with a seal carcass that had washed up on one of the beaches and become a coyote attractant. Tracking data uncovered the problem and also led to its source.
Encouraged by Middletown’s success with the use of forensic tracking, the neighboring town of Portsmouth has purchased its own high-tech collar, which NBCS has agreed to deploy and monitor.
“For our research and forensic tracking, the collars are ideal.” says Dr. Mitchell of NBCS. “We are able to identify significant food resources by generating a line between successive GPS points and looking for multiple travel vectors converging on an area. Essentially, we’re following the ‘breadcrumb trails’ left by coyotes as they frequent their favorite dining spots.” (See related story: Two collared coyotes reveal where they are fed in Middletown)
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