by Roland D. Hallee

This is the time of year that is the moment of truth. To those of you who own campers, and it has been closed up all winter, either in a field, or in storage, you almost dread the first time you open it up in the spring. The question: Did mice get in over the winter? If so, how much damage did they do?

Well, we have friends who all have different theories on how to repel these little creatures, and discourage them from entering your “summer home.”

Some of us rely on old-fashioned, time tested methods – moth balls, dryer sheets, and peppermint. Others have their own concoctions they swear by, and still others strongly believe in the “new and better” mouse trap. You know, the one where you pass a wire through the top of a five-gallon bucket, place an aluminum can through the wire, smear it with peanut butter, fill the bucket with antifreeze and build a ramp for the critter. They walk up the ramp, jump on the can – the can rotates and the mouse falls to its death in the antifreeze, to be preserved for you in the spring.

These pests typically try to find their way in when the weather takes a cold turn. Once they’ve made their way inside, it’s immediately time to start figuring out how to get rid of them. Understanding what these critters like and don’t like can help you better understand how to keep them away.

Are you rolling out the ‘Welcome’ mat for mice? Learn how to put up a ‘No Vacancy’ sign they can’t ignore!

The mouse is a small species that’s found all over the world. This highly adaptive species can survive in the wild, but they thrive when living near people where food, water, and shelter are easy to find. They are one of the most common pests to infest homes and buildings.

Jumping 18 inches in the air, climbing stairs and rough surfaces, and swimming are effortless tasks for these critters.

These pests have poor eyesight. They can’t see colors and they cannot see very far away. However, mice have a very good sense of smell that makes up for their weak eyes. They use scent markers to communicate with other mice and rely on scents to detect predators or other potential dangers. A mouse’s sense of smell is so powerful, it can identify the age and sex of another mouse up to 10 miles away!

The mouse’s small size and impressive skills make them a challenging pest, but their ability to reproduce is overwhelming. They can reproduce before they are two months old and typically have anywhere from 3 – 14 babies per litter. A female can have 5 – 10 litters each year, so do the math. It doesn’t take long for one pest to turn into a large mouse problem.

So now, let’s see what science has to say about it.

Mice have a very keen sense of smell that is much stronger than what humans experience. You can use this trait to repel mice and use scents that mice hate like cinnamon, vinegar, dryer sheets, clove oil, peppermint, tea bags, moth balls, mint toothpaste, ammonia, cloves, clove oil, and cayenne pepper.

If you have ever seen or kept a mouse, you may have noticed they seem to spend an awful lot of their time sniffing at their surroundings. Be it on their hind legs whilst twitching their whiskers, or just roaming around in their cages, their nose is always active. Sniffing is the way mice find food, communicate with one another, and are alerted to a predator’s presence.

Out of all the rodents, mice have one of the best senses of smell. Only second to rats. Mice, in fact, rodents in general, have a sense of smell that is highly developed with an incredible one percent of their DNA being dedicated to olfactory receptors.

The world of smell is also very different for mice than it is for humans, with scents from food, prey, and predators constantly bombarding them with information.

With the influx of scents coming in, you would think that it may be hard for a mouse to make sense of them all and separate what is of use such as food and predator scents from background smells.

However, this is not the case.

During experiments where mice were scent trained to pick out a certain smell from others, they could do so 85 percent of the time. This was even when a large number of background smells were included, although the more background scent included, the less reliable the mice became.

When looking for food, for example, mice use a combination of smell and touch. Their noses lead them to the source of food and their whiskers or paws brushing against it locate it exactly.

Eyesight does not really play a part in food location at all. A mouse’s vision is not particularly good.

With such a highly developed sense of smell, it really is no wonder that our homes and businesses are so attractive to unwanted mice. Any unswept crumbs or dropped food, etc., must be incredibly tempting to them.

Mice, however, do not like the smell of mint, so planting this herb around the exterior of your house can help to keep unwanted visiting mice at bay.

Surprisingly, mice do not rely totally on their noses for their sense of smell. They also have another odor detecting organ called the vomeronasal organ, or VNO, which is located in the nasal cavity. The VNO is mainly used to sense pheromones (Any of various chemical substances secreted externally which convey information to, and produce specific responses in other individuals of the same species) which a mouse can do from up to ten miles away.

Mice also have excellent hearing and will hear you coming long before you see them. In addition, they have the incredible ability to know if something is toxic, unhealthy, or inedible by its taste.

My wife and I subscribe to the moth balls, peppermint and dryer sheets. In our 42 years of camping, we have had mice in our camper on one occasion, the year we didn’t go by our past experience, and succumbed to someone else’s propaganda.

Peanut butter? You may as well send out engraved invitations – and black ties are not required.

Roland’s trivia question of the week:

Since 1967, one Boston sports team has made the playoffs 46 times (out of a possible 55 years), more than any other team in the four professional major sports. Which team is it?

Answer can be found here.

by Roland D. Hallee

Recently, I received information from the U.S. Department of Agriculture’s National Veterinary Services Labora­tories confirming the presence of highly pathogenic avian influenza (HPAI) in samples taken from small flocks of non-commercial backyard birds (non-poultry); Lincoln County (March 17); Knox and York counties (March 19); Cumberland County (March 22); and Washington County (March 26).

DACF Animal Health placed the properties under quarantine, and humane depopulation efforts have been completed.

Additional safety measures were implemented, including monitoring properties with domestic flocks within a six-mile radius and notifying bird owners of the importance of proactive safety measures to help prevent disease.

The risk for HPAI remains high, and backyard flock and commercial operators are advised to keep birds indoors to prevent the spread of this disease.

The current outbreak of HPAI is spreading across the country primarily due to the migration of wild birds. There is little evidence to suggest HPAI is being spread from farm to farm (lateral transmission). The virus is very prevalent in the environment in wild birds so flock owners need to practice strong biosecurity. More information on steps they can take to enhance biosecurity is available here: http://healthybirds. aphis. usda.gov.

Birds should be kept inside as long as the disease transmission risk is high. Please reference the Maine DACF Animal Health website for up-to-date information.

Because HPAI is being spread by migrating wild birds, it is difficult to predict what will happen over the next couple months. The trends observed with past North American HPAI outbreaks are that there is often a reprieve in the summer months. Summer is when the virus present on the landscape (outdoors) is degraded by sunlight and heat. Migratory waterfowl (ducks, geese, and shorebirds) moving south in the fall months are likely to shed AI virus again. It is critically important that poultry owners work now to provide indoor shelter for their birds through the fall and provide outdoor access only in covered poultry runs, allowing protection from predators and preventing contact with wild waterfowl and their droppings.

When purchasing new birds it’s always recommended to only purchase birds from a reputable source that follows effective biosecurity protocols and closely monitors poultry health.

Some of the signs to look for are sudden death without clinical signs; Lack of energy and appetite; Decreased egg production or soft-shelled or misshapen eggs; Swelling of the head, comb, eyelid, wattles, and hocks; Purple discoloration of wattles, comb, and legs; Nasal discharge, coughing, and sneezing; Incoordination; or Diarrhea. Learn more.

The best approach to protect the flock is to practice good biosecurity – this means keeping your birds separate from sources of disease, such as infected wild birds and their environment.

Report sick birds or unusual bird deaths to State/Federal officials, either through your state veterinarian or through USDA’s toll-free number at 1-866-536-7593.

Can people contract AI? No cases of this particular strain of the avian influenza virus have been detected in humans in the United States. According to the U.S. Centers for Disease Control and Prevention, recent detections of this strain of influenza in birds in Maine and several other states present a low risk to the public.

Poultry and eggs are safe to eat when handled and cooked properly. Eggs from a known infected flock are safely disposed of.

There is compensation available. Refer to the USDA APHIS website to learn what is covered and how the process works.

USDA has many resources available for commercial poultry producers and backyard bird owners through its Defend the Flock campaign. Information about this campaign and links to toolkits containing biosecurity checklists, videos, and more, are available.

DACF’s Animal Health team is also working closely with the Maine Center for Disease Control and Prevention (Maine CDC). Though this strain of avian influenza has not been detected in humans in the United States, Maine CDC is monitoring the health and wellbeing of animal health staff and flock owners who were exposed out of an abundance of caution. Signs and symptoms of bird flu infections in people can include fever (temperature of 100°F or greater) or feeling feverish, cough, sore throat, runny or stuffy nose, muscle or body aches, fatigue, headaches, eye redness (or conjunctivitis), and difficulty breathing.

Other possible symptoms are diarrhea, nausea, and vomiting. As with seasonal flu, some people are at high risk of getting very sick from bird flu infections, including pregnant women, people with weakened immune systems, and people 65 and older. The U.S. CDC provides information on avian flu transmission. The Maine CDC’s Health and Environmental Testing Laboratory is prepared to process samples and quickly provide results for anyone potentially exposed to the virus.

Roland’s trivia question of the week:

What was the nickname of the Boston professional American League baseball team between 1901 and 1907?

Answer can be found here.

by Roland D. Hallee

Recently, a regular contributor to The Town Line, Gary Kennedy, of Chelsea, and his wife Julie witnessed a battle between an osprey and a bald eagle, probably over territorial rites – or food.

I could relate to the story as my wife and I witnessed the same a few years ago while fishing on Webber Pond. In both instances, the bald eagle won the day. So, do bald eagles and ospreys get along?

Opportunistic bald eagles and ospreys share much of the same habitat, so ospreys are frequently the victims of nest raids by the eagles. Proud, powerful and the national symbol of the United States, bald eagles are birds of prey that are extremely territorial during nesting season but highly social at other times.

They use their talons to fish; or, instead of catching their own, they’ll go after an osprey or another fish-eating bird, forcing it to drop its prey, which the eagle grabs in midair.

Opportunists, they’ll also scavenge carrion or catch and eat amphibians, invertebrates, small mammals, reptiles and other birds’ fledglings.

Once an eagle gets you in its sights, it can be a vigorous foe—as that osprey recently learned.

Ospreys require nest sites in open surroundings for easy approach, with wide, sturdy bases and safety from ground predators, such as raccoons.

In Kennedy’s video, you see a bald eagle and an osprey do combat. As part of their plan of attack, at dusk, with both osprey parents away, the bald eagle will sweep in from over the water toward the nest containing three chicks. One of the osprey parents will engage the eagle, ready to defend the nest, but it can’t match the speed and strength of the eagle, which manages to nab one of the chicks with its huge talons before taking off.

It’s not uncommon for osprey to lose their entire brood to eagle attacks.

Adept at soaring and diving but not as maneuverable as other hawks, ospreys fly with stiff wingbeats in a steady, rowing motion. They do, however, vigorously chase birds that encroach on their nests.

But ospreys, too, launch their share of attacks ­– and some of them are on eagles. They have been observed attacking a Canada gooose who happened to be at the wrong place at the wrong time.

Is it a coincidence that bald eagles will frequently build their nests near osprey nests. Not really. It’s just the bald eagle is smart enough to know that if it nests near ospreys, that it will have ample opportunity to steal fish from the ospreys throughout summer?

However, there are many differences between ospreys and bald eagles.

Size: Osprey have an average 59- to 70-inch wingspan and weigh three to four pounds. They have long, narrow wings with a marked kink that makes them look like an M-shape from below.

The bald eagle is one of the largest birds in North America, with an average 80-inch wingspan and weighing 6.5 to almost 14 pounds.

Diet: Osprey eat a diet of about 99 percent fish, usually 4 – 12 inches long. The type of fish varies depending on where in the world the osprey lives.

Bald eagles love fish as well, and sometimes rather than doing their own hunting they will harass osprey, making them drop their fish or even steal their fish right out of their talons.

Bald eagles also eat birds, reptiles, amphibians, rabbits and muskrat, both live or as carrion. They sometimes gorge on food and digest it over several days, and they can also survive fasting for many days or even weeks.

Beak: An osprey’s beak is black, short and has a sharp hook that helps it tear into fish to eat.

Bald eagles have a yellow beak which is also hooked for tearing into flesh.

Special abilities: Osprey can dive about three feet into the water to catch fish, and they can dive both head and feet first. They also have the ability to take off straight from the water instead of having to swim to shore.

Sometimes bald eagles hunt cooperatively, with one individual flushing prey toward another.

Nest: Osprey nests are built of sticks and lined with bark, sod, grasses, corn stalks and other softer materials. Most nesting platforms are about 5 feet wide and a foot deep. However, it has been seen that osprey who nest in the same place year after year have ended up with nests 10-13 feet deep and 3-6 feet in diameter.

Osprey also like to nest in open areas, usually built on snags, treetops, cliffs or human-built platforms, cell phone towers or light towers.

Bald eagles nest in trees, usually conifers, and create huge nests — five to six feet wide and two to four feet deep – out of sticks lined with grass, moss or corn stalks. Nests can take up to three months to build. Bald eagles typically build near the trunk of a tree, high but not at the crown like osprey. Some eagles also nest on the ground when necessary, using kelp or driftwood for construction near coastal shorelines.

Ospreys and bald eagles, although they usually share territory, and in the case of the eagle, the osprey’s catch of the day, are quite different in their own right.

Roland’s trivia question of the week:

Has anyone pitched a no-hitter in the World Series?

Answer can be found here.

by Roland D. Hallee

I saw an article recently in one of the local newspaper that fossils of an octopus were found in Montana, probably dated back before dinosaurs, some 330 million years. Let’s take a look at these denizens of the deep, at a creature we really don’t know that much about. We know what they look like, and some of what they do, but for what else would they be useful .

An octopus is a soft-bodied, eight-limbed mollusk. The soft body can radically alter its shape, enabling octopuses to squeeze through small gaps. They trail their eight appendages behind them as they swim. Octopuses have a complex nervous system and excellent sight, and are among the most intelligent and behaviorally diverse of all invertebrates.

Octopuses inhabit various regions of the ocean, including coral reefs, pelagic waters, and the seabed; some live in the intertidal zone and others at abyssal depths. Most species grow quickly, mature early, and are short-lived. In most species, the male uses a specially adapted arm to deliver a bundle of sperm directly into the female’s mantle cavity, after which he becomes senescent and dies, while the female deposits fertilized eggs in a den and cares for them until they hatch, after which she also dies. Strategies to defend themselves against predators include the expulsion of ink, the use of camouflage and threat displays, the ability to jet quickly through the water and hide, and even deceit. All octopuses are venomous, but only the blue-ringed octopuses are known to be deadly to humans.

The giant Pacific octopus is often cited as the largest known octopus species. Adults usually weigh around 33 pounds, with an arm span of up to 14 feet.

The skin consists of a thin outer epidermis with mucous cells and sensory cells, and a connective tissue dermis consisting largely of collagen fibers and various cells allowing color change. Most of the body is made of soft tissue allowing it to lengthen, contract, and contort itself. The octopus can squeeze through tiny gaps. Lacking skeletal support, the arms work as muscular hydrostats and contain longitudinal, transverse and circular muscles around a central axial nerve. They can extend and contract, twist to left or right, bend at any place in any direction or be held rigid.

The ink sac of an octopus is located under the digestive gland. A gland attached to the sac produces the ink, and the sac stores it. The sac is close enough to the funnel for the octopus to shoot out the ink with a water jet. Before it leaves the funnel, the ink passes through glands which mix it with mucus, creating a thick, dark blob which allows the animal to escape from a predator.[61] The main pigment in the ink is melanin, which gives it its black color. Cirrate octopuses usually lack the ink sac.

The reproduction of octopuses has been studied in only a few species. One such species is the giant Pacific octopus, in which courtship is accompanied, especially in the male, by changes in skin texture and color. About 40 days after mating, the female giant Pacific octopus attaches strings of small fertilized eggs (10,000 to 70,000 in total) to rocks in a crevice or under an overhang. Here she guards and cares for them for about five months (160 days) until they hatch. In colder waters, such as those off Alaska, it may take up to ten months for the eggs to completely develop.

Octopuses have a relatively short lifespan; some species live for as little as six months. The Giant Pacific Octopus, one of the two largest species of octopus, may live for as much as five years. Octopus lifespan is limited by reproduction. For most octopuses the last stage of their life is called senescence. It is the breakdown of cellular function without repair or replacement. For males, this typically begins after mating. Senescence may last from weeks to a few months, at most. For females, it begins when they lay a clutch of eggs. Females will spend all their time aerating and protecting their eggs until they are ready to hatch. During senescence, an octopus does not feed and quickly weakens. Lesions begin to form and the octopus literally degenerates. Unable to defend themselves, octopuses often fall prey to predators. The larger Pacific striped octopus (LPSO) is an exception, as it can reproduce multiple times over a life of around two years.

Most species are solitary when not mating, though a few are known to occur in high densities and with frequent interactions, signaling, mate defending and eviction of individuals from dens. This is likely the result of abundant food supplies combined with limited den sites.

Nearly all octopuses are predatory; bottom-dwelling octopuses eat mainly crustaceans, worms, and other molluscs such as whelks and clams; open-ocean octopuses eat mainly prawns, fish and other cephalopods.

The octopuses evolved from the Muensterelloidea (fossil pictured) in the Jurassic period.

They evolved in the Cambrian some 530 million years ago. The earliest octopus likely lived near the sea floor in shallow marine environments. Since octopuses consist mostly of soft tissue, fossils are relatively rare. As soft-bodied cephalopods, they lack the external shell of most molluscs.

Octopuses appear in mythology as sea monsters like the Kraken, of Norway, and the Akkorokamui, of the Ainu, and probably the Gorgon, of ancient Greece. A battle with an octopus appears in Victor Hugo’s book Toilers of the Sea, inspiring other works such as Ian Fleming’s (creator of James Bond) Octopussy. Octopuses appear in Japanese erotic art, shunga. They are eaten and considered a delicacy by humans in many parts of the world, especially the Mediterranean and the Asian seas.

I once tasted calamari while in Vietnam, mostly as jerky – it was a little salty.

Historically, the first plural to commonly appear in English language sources, in the early 19th century, is the Latinate form “octopi”, followed by the English form “octopuses” in the latter half of the same century. The Hellenic plural is roughly contemporary in usage, although it is also the rarest. Oxford American Dictionary (3rd Edition, 2010) lists “octopuses” as the only acceptable pluralization, and indicates that “octopodes” is still occasionally used, but that “octopi” is incorrect.

Well, I hope we now know a little more about these creatures.

Roland’s trivia question of the week:

How many Boston Red Sox players have been named World Series MVP?

Answer can be found here.