An online resource based on the award-winning nature guide

Mammals

Moose & Water

moose shaking 472Moose spend a great deal of time in and near bodies of water, feeding, cooling themselves and avoiding insects. They are powerful swimmers, exhibiting great speed and endurance. Moose have been observed swimming distances up to 12 miles, and are known to occasionally swim from one point of land to another when the distance is shorter by water than by land. (Adult moose usually swim with only their head out of water, whereas yearlings have most of their back exposed.) Moose can spread their hooves, and this is ability is thought to enhance their paddling skills.

Much of a moose’s summer diet is semi-aquatic and aquatic vegetation, thus they feed near shore as well as in deeper water. Studies have shown that moose will dive as deep as 18 feet to obtain submerged plants. It is slightly unsettling to see them totally disappear for up to nearly a minute while foraging under water!

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Moose Pheromones Active During Rut

9-11-14 cow moose urinating 436While the mating season, or rut, for moose peaks between late September and early October, mating behavior can already be observed. It is widely known that male, or bull, moose often paw a pit in the ground, urinate in it and then stomp in it in order to splash their underside, slap the urine with their antlers to disperse it, and lay down in the pit and wallow in their urine, soaking their undersides and neck. Their pungent urine serves as an aphrodisiac for female, or cow, moose, which are attracted to the pheromones it contains. A cow will enter a wallow, aggressively displacing the bull at times and even drink his urine.

However, it’s not just bull moose urine that attracts the opposite sex. The urine of a cow in heat (defined as the two days of their estrous cycle when they will allow a bull to mount them) is equally as attractive to bulls. At this time of their reproductive cycle cows frequently will urinate in the water and along the shoreline of lakes and ponds (look closely at photo).

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Cow Moose Bulking Up for Winter

cow moose head 461


Moose Gaining Fat Reserves

9-10-14  moose standing in water 277Being an ardent admirer of moose, I am devoting today’s post as well as the next two posts to the largest member of the deer family. Even if it weren’t seven to ten feet long and didn’t weigh over a thousand pounds, a moose would be an impressive mammal, with its high, humped shoulders, broad, pendulous muzzle and long, coarse hair.

Moose are voracious eaters, consuming roughly 44 pounds of plant material a day. In the winter their diet, mainly the bark of woody plants, provides only about 70% of the energy they need to survive. Thus, during the spring and summer they spend up to 12 hours a day foraging, often for aquatic plants, and acquire more than 200% of the energy they need. Hundreds of pounds are gained, with the excess stored as fat reserves for the coming months. Even so, moose lose up to 20% of their weight over the winter. (Thanks to all who wished me happy recharging!)

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Black Bear Scats Reveal Diet

8-25-14  black bear blueberry scat 062Black Bears are eating heavily now, in preparation for the coming winter when they will not eat or drink for several months. Some of what goes in must come out, however, and it can tell you a lot about the diet of an animal. Black bear scats typically weigh ½ to 1 pound or more. They have different shapes and consistencies, depending on what the bear has eaten. Black bear scats may be tubular or loose, depending on the amount of moisture in the food that the bear ate. Scat from succulent vegetation or berries is typically loose. Interestingly, black bear scats do not have an unpleasant smell if the bears ate only fruit, nuts, acorns, or vegetation — they smell like a slightly fermented version of whatever the bear ate.

At this time of year, Blackberries, Wild Sarsaparilla fruit and Blueberries are ripe and favored by bears. You can determine what a bear has been eating by the shape and size of the seeds in its scat. (A bear’s scat can consist of just one type of fruit if there is an ample supply of that fruit.) Wild Sarsaparilla seeds are crescent shaped, Blueberry seeds are tiny and sand-like, and Blackberry seeds are larger than Blueberry seeds. Blueberry scat (pictured) usually includes whole berries that were not soft and ripe enough to be broken up in the bear’s stomach. Bears hardly stop to chew berries. Instead, they swallow them whole and let the muscular, gizzard-like section of their stomach grind the pulp off the seeds. (Thanks to Jeannie Killam for photo op.)

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Raccoons Quick and Adept Hunters

raccoon pond scat 134Not everyone enjoys discovering what an animal eats by dissecting its scat, but for those of us who do, the revelations can be worth the effort. One quick glance at the shape and size of the pictured scat confirmed that a raccoon had been in the vicinity and bits of crayfish exoskeleton in it indicated that the raccoon fed from the nearby pond. Further examination of the contents revealed that raccoons are fast enough to catch dragonflies – something I wouldn’t have necessarily known and most likely wouldn’t observe in the field. Who would have guessed that raccoons are quick enough or interested enough in dragonflies to catch them? (NB: Do not do as I did – do not touch or dissect raccoon scat as it can contain bacteria, ticks and Baylisascaris roundworms which can cause neurological damage.)

As an aside, I thought it might be of interest for readers to know what goes into the making of a Naturally Curious post. The following describes my morning yesterday: out for a walk, visit a pond, see scat on a big, wooden raft that has floated near shore, manage to leap onto raft to take a picture of the scat, photograph scat and then look up to see that my leap has shoved the raft away from the edge of the pond, and I’ve drifted out into the middle of said pond. Balancing the camera on the raft, I paddle, first with one hand and then with both (at one corner), trying to move this 15’ x 15’ wooden structure in the direction I want it to go. Make a little progress, but not much. Beloved chocolate lab swims up to raft, I hold onto her neck and she pulls us to shore, camera intact. And I haven’t even begun to dissect, photograph, label and write about the contents of what led me on this adventure!

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Young Beavers Out and About

8-5-14 adult and young beaver2 082Most beavers are born between May and early July, weighing one pound and measuring a foot long. They are fully furred, their eyes and ears are open and they know how to swim. Even so, they don’t usually venture out of the lodge for the first month or so. Initially their fur isn’t water-repellent, but by three to four weeks of age, the young beavers’ anal glands, used in greasing their fur, are functional. When the kits weigh seven or eight pounds, they start to leave the lodge regularly to explore their pond and feed with their parents and older siblings.

Naturally Curious is supported by donations. If you choose to contribute, you may go to http://www.naturallycuriouswithmaryholland.wordpress.com and click on the yellow “donate” button.


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