SCOTT HUBER
Many state and federal predator control programs began in 1915 as demonstration programs, but were expanded following the ban of toxicants in 1972. The federal government – in cooperation with state governments and other stakeholders – created predator control programs in numerous Western states as a means of providing a degree of accountability and professionalism to these programs.
The predator control programs were implemented to replace banned toxicants such as Strychnine and Compound 1080. Following the ban on toxicants, coyote populations increased exponentially in many Western states despite extensive efforts to control their numbers. This increase in coyote numbers was the primary catalyst for the development of many of these predator control programs.
JUSTIFICATION FOR PREDATOR PROGRAMS
It is important to understand that the justification for any predator damage management program is based on what livestock and resource losses would be in the absence of such a program.
Although there are a number of studies that have been conducted to measure livestock and resource losses in the presence of existing PDM programs, there were five studies which measured losses to domestic sheep in the absence of PDM programs. One of these was a study conducted in southwest Montana in the 1970s that measured livestock losses in the absence of PDM efforts. This study was unique and important from that standpoint. It was referred to as the Cook Ranch Study and the results were published in the Wildlife Society Bulletin.
Coyote populations were allowed to build up around the Cook Ranch for a year prior to the study. Livestock losses were evaluated and documented on the ranch for three years following this coyote population buildup. The results of this study showed the average annual lamb loss on this 1,000-plus head ewe operation to be around 26 percent for the three years of the study – with coyotes being the primary cause of predation. This study also revealed two other important factors contrary to popular belief. First, coyotes did not single out the sick and the weak lambs and many lambs were killed by coyotes and never fed on.
This study proved what many in the PDM business have long understood regarding what the losses would be in the absence of these PDM efforts. At one point, the study was in risk of being discontinued due to the costs of livestock loss reimbursement, but funding was obtained and the study was continued for three years. Another important observation this study revealed is that once coyote populations were allowed to build up in this area – both preceding and during this research – it was extremely difficult to reduce those coyote populations back to their historic levels. This in turn led to additional predation in subsequent years.
Bodenchuk et al (2002) presented a summary of the five sheep studies, two goat studies and one calf analysis – all conducted in the absence of predation management. For the sheep studies, the average lamb loss was 18 percent, while the average adult sheep loss for those studies was 6 percent. In the two goat studies, predators killed 50 percent of the goats in one study before the landowner canceled his cooperation. In the other study, predators killed 100 percent of the goats. Calf predation in the absence of predation management was studied in Utah, where producers experiencing losses – not all cattle producers experience loss – had an average of 3.6 percent calf loss before control was initiated. With management in place, losses can still occur, and the authors reported an average of 5 percent lamb losses, 3 percent adult sheep losses, and 0.5 percent calf losses with management in place. Clearly, an effective predation management program is necessary for those producers experiencing losses.
Predation management has direct, spillover and intangible benefits (Shwiff and Bodenchuk 2004), with direct benefits to livestock producers and indirect benefits to wildlife.
Direct benefits are measured in livestock saved. It is impossible to measure what did not occur, but by comparing losses observed in the absence of predation management to the losses observed in the presence of predation management, managers can estimate the savings. Bodenchuk et al (2002) calculated savings nationwide for predation management clients from 1999, based on the expected and observed loss rates for calves, goats and sheep using the 1999 market value of those animals. The direct savings for that year was valued at $62.6 million or a 3:1 benefit/cost ratio.
Indirect benefits for wildlife have been evaluated in several instances. Shwiff and Merrill (2004) calculated benefits to pronghorn from coyote removals directed at calf protection at between $75,000 and $185,000 annually for two research years in Wyoming.
PDMS CURRENTLY IN OPERATION
Most Western states have federally managed PDM programs – the U.S. Department of Agriculture’s Wildlife Services, state-managed wildlife damage management programs or county managed PDM programs. Some states such as Montana and Wyoming have a combination of both federal- and county-managed PDM programs.
Like any other program, the success of these programs is determined by the knowledge and experience of those overseeing them, the qualities of the employees providing the service, and the availability of funding.
FUNDING SOURCES
The funding for coyote damage management in many of these programs comes from various sources. These programs rely on a combination of funds derived from self-assessed producer support – i.e. local brand fees on livestock or a per acre assessment as is common in Texas – county funds, state funds and federal funds. South Dakota’s state managed WDM program includes significant funding from sportsmen and women. Adequate funding has always been one of the biggest challenges facing most of these predator damage management programs.
In many cases, wildlife also benefit from coyote removal for livestock protection, particularly in cases where coyotes are being removed in places and at a time of the year when deer, antelope and ground nesting birds are being born. Coyote population control in these areas is particularly beneficial during the years when deer and antelope populations are in a mode of recovery following winter or disease die offs.
Numerous studies have proven this although in many states, wildlife dollars are not funding predator control to the levels they should be. Nevada includes a predation management fee as part of license applications and Utah provides additional support for predation management in areas where wildlife populations are not meeting objectives. Because the South Dakota program is administered by the South Dakota Game, Fish and Parks, sportsman’s funding is integral to the program and wildlife management objectives are considered statewide.
THE IMPORTANCE OF LEADERSHIP
The success and/or failure of various PDM programs in recent years have proven to be directly related to the knowledge and the experience of the leaders responsible for overseeing these programs. Some of the most important qualities of an effective PDM program leader are:
• Predator/coyote damage management field experience.
• Excellent communication and people skills.
• Political savvy.
• Honesty and Integrity.
• Solid understanding of predator biology, as well as wildlife management principles and practices.
• Background/knowledge of agricultural related issues.
• Understanding the importance of program accountability and transparency.
• Understanding the importance of fostering relations with various stakeholder groups.
One absolute necessity for county, state or federal PDM programs is the ability to hire qualified individuals, and the ability to replace those who are not productive. Many of the same qualities of good program leadership are also important for field employees. Some of the most important qualities of a good employee are:
• Coyote trapping / hunting experience and knowledge.
• Good work ethic.
• Honesty and Integrity.
• Excellent communication and people skills.
• Understanding the importance of accountability.
• Background/knowledge in agricultural related issues.
• A hunger to continually improve techniques.
• Flexibility to work odd/unique hours (this is not a 9 a.m. to 5 p.m. job).
• Willingness to work alone in extreme weather conditions.
• Solid understanding of predator biology, as well as wildlife management principles and practices.
The most effective PDM employees have most or all of the above-mentioned qualities. There are no employee qualities more important than the willingness to get out and work hard and document those efforts. Effective employees have excellent people skills and are honest about what they are doing. They get to know the livestock producers they serve on a personal basis and become involved in community-related functions. An effective employee communicates regularly with the producers they serve keeping them aware of ongoing coyote damage management efforts and involves them in the process.
OTHER FACTORS FOR SUCCESS
It takes extensive PDM field experience to understand the size district that can be effectively managed for coyotes within both budgetary and time constraints. The variables that play a role in this are the number of producers and livestock being served, the number of complaints received annually, varying coyote populations, amount of time spent driving, and the amount of land that needs to be covered to provide adequate service for those producers.
Topography of land and access will play a role in determining how much land can be effectively covered by ground and/or aerial hunting operations. In states with bears, lions or wolves, the necessity for an employee to respond to these high-risk predation events will likely reduce their attention to coyote problems. Program managers might need to assign specialists to assist with seasonal predation issues – such as lion predation in the summer – or predation involving special-category predators – grizzly bears, wolves, etc.
Restrictions related to public land can become a limiting factor, as well. Trappers that are very good at being efficient and managing their time effectively will be able to cover more area and complaints than those who are not. Effective PDM efforts require an understanding of the timeliness and seasonality of coyote removal to prevent problems before they occur, which helps reduce workloads later. It also requires knowledge of which tools will be most efficient and cost effective in each situation and the time of year when they are most effective.
Another factor that can play a significant role in changing annual PDM workloads is the presence of diseases that impact coyote populations such as mange, distemper or parvo.
ACCOUNTABILITY & TRANSPARENCY
It is imperative that PDM programs are accountable to those who are paying for this service. This usually entails detailed reports of daily activities and the results of those efforts. Reports can include type of complaints worked – livestock loss or request for service/preventative measures – reported and/or verified livestock loss, date and the number of hours worked, properties worked, daily miles driven with pickup and ATV, amount and type of equipment set or pulled and when these sets are checked, animals taken and by what method, dens/pups taken, hours worked with aerial operations, coyote fertility checked and documented, meetings attended, fuel receipts and equipment purchases. Reports generated by government agents will be considered public records and may be available under open records acts.
Honest recordkeeping is imperative to relationship building and the integrity of an effective PDM program. As part of this program accountability, I believe it is important to have GPS coordinates and pictures of coyote dens and pictures of coyotes taken to be available upon request. Accountability develops trust between employees and livestock producers. Daily activity reports can then be compiled into monthly activity reports, as well as yearly reports to be given to those who are paying for these services.
It is important to provide detailed reports whether they are requested or not. At some point, funding for all predator control programs will need to be justified and understood.
MEASURING SUCCESS
A Wildlife Services program in one of the Western states showed its commitment to the livestock industry in that state by developing livestock loss goals to manage for. The goal was to keep livestock losses to a minimum while monitoring losses to keep all producers below these livestock loss goals. In the process, the program committed to reallocating resources to any producers that reached losses above these goals. The goals developed were 1 percent of calves, 3 percent of adult sheep and 5 percent of lambs within individual herds and flocks.
In looking back on my own experiences, I feel that these are very realistic goals of livestock loss in many situations in the West. That being said, 2 percent calf loss might be a more realistic goal for states like South Dakota and North Dakota. With minor adjustments to different situations, I believe these goals are a good benchmark to try to achieve when adequate resources are available. In many states, livestock losses to big game predators – mountain lions and bears – are addressed on a corrective basis only and initiated after losses occur. Livestock losses to predators will never be eliminated but can be greatly reduced.
Predator damage management programs are often incorrectly evaluated by comparing dollars spent per coyote killed or dollars spent per livestock loss when the most appropriate way to objectively measure the success of PDM programs is dollars spent per livestock and/or wildlife saved. There have been countless studies conducted to document the impact predators can have on big game populations, particularly when they are below management objectives and in a state of recovery.
In Campbell County, Wyo., in 2013, a three-year livestock producer survey was initiated on livestock losses to predators in the county. The results of this survey showed lamb losses to predators on 29,000 mostly range lambing sheep were kept below 2.6 percent for three consecutive years. This is testimony to a successful PDM program. I would be remiss if I didn’t mention that Campbell County is surrounded by seven other counties with very good predator control programs in place that greatly enhance Campbell County’s success. In addition, we worked with a highly skilled and effective aerial hunting pilot who contributed greatly to the efficiency of the program.
Trends in coyote numbers in certain areas can be monitored from year to year by tracking the number of coyotes killed per hour of aerial hunting. There are numerous variables that can affect the success of aerial operations, such as ground and weather conditions, pilot/gunner efficiency, ground crew efficiency and these variables should be considered with any comparison of one area to the next or when comparing different years. This year-to-year comparison of the number of coyotes taken per hour of aerial hunting would be most applicable in areas with large amounts of accessible ground that is conducive to successful aerial hunting operations.
A perfect example of a variable affecting this would be snow conditions in Northern states that enhance winter aerial hunting effectiveness by grouping coyotes near limited food sources and making them easier to spot from the air while at the same time minimizing the number of coyotes that can be taken by ground methods due to difficult accessibility.
With reduced coyote control efforts in certain areas, coyote populations can quickly recover and create a corresponding increase in coyote predation as a result. When South Dakota reduced its predator control efforts in 2009, coyote populations increased 400 percent within three years in the traditional sheep producing counties of northwest South Dakota. This coyote population increase was documented based on annual aerial hunting records. As would be expected, increases in livestock losses directly corresponded with the increase in coyote populations in this area. Another example of this would be how reports of documented livestock losses in northeast South Dakota have shown increases in calf kills directly corresponding with an increase in annual coyote populations.
In some areas conducive to effective aerial hunting – such as many areas in western North Dakota and South Dakota – one effective way to measure trapper efficiency is to compare verified ground take of coyotes to the number of coyotes taken with a common number of aerial hunting hours in that same district. In many situations, if coyotes are there to be taken by aircraft, they are there to be taken on the ground, as well, on an annual basis. Making this ground to air coyote take comparison also considers the important differences in coyote populations between different trapper districts.
On average in South Dakota, 50 hours of actual hunting time on an annual basis is/was quite common for many trapper districts. Based on that, coyote take from 50 hours of hunting time could be used as an objective common comparison to the ground take in the same trapper district. This same ground to air coyote take ratio can also be used to compare to other trapper districts with similar circumstances. In South Dakota, most efficient, dedicated, full-time trappers had a goal to take at least as many coyotes on the ground as could be taken in the same district with 50 hours of flying.
Based on my experience and the experience of many other full time PDM trappers, a minimum of 50 percent ground take seems like a reasonable and achievable goal with the right knowledge and work ethic. As an example, if a county flies 50 hours of actual hunting time in a given year and removes 250 coyotes – five coyotes per hour of aerial hunting – a full-time trapper should be able to remove a minimum of 250 coyotes on the ground in the same district in the same year. This ground to air coyote take comparison must consider extreme weather conditions that can enhance aerial hunting operations and limit ground take. This comparison is certainly not applicable in areas that are not conducive to successful aerial hunting operations or have limited aerial hunting opportunities. This comparison must also consider other designated job responsibilities.
Both reported and documented livestock losses, as well as coyotes taken by both air and ground, should be used to measure the success of a predator control program. Year-to-year comparisons should consider the variables involved that can affect these numbers.
Scott Huber is from Kadoka, S.D. He worked for the S.D. Department of Game, Fish & Parks as a state trapper from 1986 to 2011. He also worked as a county trapper in Campbell County, Wyo., from 2012 to 2016.
This is the first in a multi-part series of articles on predator damage management programs. Look for the next article in the series in the June 2024 issue of the Sheep Industry News.