The Trouble With Solutions

 

This week Boston news ran a story about how Medford residents are frustrated with the large number of rats (the picture was of a mouse) inhabiting their hamlet. Trust me Medford, when I post that I feel your angst.

Knowing practically nothing about Medford, I took a guess and commented that Medford didn't so much as have a rat problem as they had a shortage of predators problem. Suggesting that Medford increase their number of snakes, fox, weasel, raptor and coyote earned me more than a few laughing emojis. 

I had to concede that one solution does not fit all scenarios; and oddly enough other people who read the Boston news also had their own ideas on how to solve the infestation. In fact, several suggested domestic cats, like this new to my yard cat for example. While I imagine that our beloved neighborhood cat Tobie is none to pleased about this fluffy orange cat checking out his turf, Tobie clearly is not handling all of my rodent woes on his own.  If I'm to be honest however, I also must include to the list of cat solution conflicts, that it's estimated that outdoor cats kill between 30 to 48 birds per cat per year. That's 1.3 to 4 billion birds a year! (The Cornell Lab, All About Birds). 

I wondered if perhaps the solution didn't require a larger cat, one that didn't focus on birds so much? As it turns out, bobcats eat both birds and small rodents and a lot of other things; but mostly they prefer to dine on hair and rabbits. 

(bobcat) 

Perhaps it's time that I step out of the realm of Medford and check out something closer to home. There is currently quite the dustup over a certain gray fox wandering about in Saxtons River. It seems that residents are worried about the fox rambling about so close to houses during daylight hours. Some even suggesting that such behavior is odd for a fox and that it might in fact have rabies. One invested participant informed readers that they should stop composting for the time being as the fox was after their compost. I can imagine how she thought this as rodents do favor compost piles and fox favor eating rodents. 

All of this begs to question, what else do we get wrong? 

No, that's not a huge rat in my yard, it is an opossum. Feeling poorly for the Saxtons River fox, I attempted to defend its honor by explaining the tick / Lyme disease cycle and how mice are largely responsible for the transmission of bacterium Borrelia burgdorferi to ticks which in turn bite us causing Lyme disease. I know it's confusing because we call them deer ticks. Deer are poor transmitters however and they most often are just free transportation and a blood meal for the ticks. Mice account for around 90% of bacterium transmission rates to infected ticks. If you want to learn more about the tick/ Lyme connection and ways to reduce ticks in your yard, click on this link.  Just keep in mind that fox eat mice and mice infect ticks.

But doesn't it just make sense to learn to fall in love with passive tick eating opossums instead?

Admittedly, I too fell for the report that claimed that opossum eat thousands of ticks in a season. The trouble is, that research had yet to be peer reviewed prior to it exploding all over social media. Subsequent studies found no evidence supporting that opossum eat ticks. Love them anyway.

So it seems that we are back to reducing  mice populations and you might be surprised to learn what else eats mice and other small rodents.

(fluffy skunk bottom)

If nothing else is available racoons will eat mice too.

Crows, ravens, eagles, hawks, owls, blue herons and other birds eat mice.

Snakes, toads and frogs will eat mice too. Because so many animals eat small rodents and carrion, rat poison shouldn't be used outdoors where it can get into the food stream. Animals that consume a poisoned rodent are in danger of being poisoned themselves; and that includes our neighborhood cats.

 If the goal is to rid communities of rats (small rodents), then consider this: While it's true that too high of a concentration of rats potentially increases the spread of disease, it's also true that too few rats removes an important food source for wildlife.  Click on the link to read VT Small Mammal Atlas which states in part that, "So why aren't we over run with these rodents? Because they are a food source for most of the carnivores and omnivores living in our fields and forests. Without this food base our wildlife pyramid might collapse." The article also states that "of Vermont's 35 small mammal species, 13 (37%) are considered of highest conservation priority."

So while Medford and other communities may indeed be noticing an increase in the population of rats this spring, it's doubtful that their problems began with this spring's litters.  Their solution to this challenge is to figure out which part of it is the problem and which part the solution. In closing, I will share this one nature find. When I moved our winter birdfeeders away from our house, the mouse population inside our house dropped off.- Norma Manning