An online resource based on the award-winning nature guide

Animal Signs

The Silent Communication of White-tailed Bucks

9-23-14  antler rub IMG_7310Rising levels of testosterone circulating in a buck’s blood toward the end of summer results in the maturation of antlers and the drying up of the velvet that was providing nutrients to them. It used to be thought that bucks engaged in rubbing their antlers against saplings at this time of year in order to remove the velvet, but research has shown there is much more behind this behavior. Rubs are visual and olfactory sign posts that transmit important information to other bucks and does in the area prior to and during rut, such as individual buck identification, breeding readiness, age and hierarchy.

The positioning of the antlers against a tree is not random — a buck generally rubs the base of his antlers and his forehead skin against the tree. The skin between antlers contains a multitude of scent-producing skin glands called apocrine glands (humans have them and utilize them during emotional sweating). These glands typically are inactive during the summer months, but in response to rising testosterone levels, they become increasingly active in the fall. The most active glands are found in mature dominant bucks.

Thanks to recent studies we know that more rubs are made in years of good acorn production than in poor mast years. Young bucks appear to make fewer rubs than mature bucks, and they tend to start rubbing much later in the fall (so rubs you find now were most likely made by mature bucks). Research suggests that older bucks may be making more than 1200 rubs during the roughly 90-day rubbing period, which comes to about 15 rubs per day.

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.


Baltimore Orioles Building Nests

6-13-14  b.oriole nestOnce the female Baltimore Oriole has selected her mate, she chooses a nesting site within his territory, often the tip of a slender outer tree branch, as it’s relatively inaccessible to predators. The female usually builds the nest by herself, taking 4 – 15 days to complete it. The first few fibers are wrapped loosely around branches. With apparently random poking, knots and tangles are created in these fibers. The female than adds more fibers, one at a time, to extend, close and line the nest. Somewhat miraculously, after days of laborious work, the nest takes on its gourd-like shape. Initially the weaving of fibers from plants such as grasses, milkweed stems or grapevine bark can be observed (horse hair, twine and synthetic fibers are also used). Towards the end, when the nest lining is added, the bird is hidden inside the nest and all that’s visible is the periodic bulging of the nest where she is applying softer material (often cottonwood or willow seed fluff, milkweed seed plumes or feathers) to cushion her eggs and nestlings.

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.


Signs Of An Active Beaver Pond

4-7-14  floating beaver logs IMG_0159Beaver ponds have finally started to melt, making it easy to determine whether or not there have been beavers living in any existing lodges over the winter. The tell-tale sign is floating de-barked sticks and branches. During the winter, beavers leave their lodge and swim out to their underwater food supply pile and haul branches back into the lodge where they chew them into foot-long pieces for easy handling. The bark is removed and eaten as the beaver holds the stick and turns it, much as we consume corn on the cob. When little or no bark remains, the stick is discarded out in the open water. These sticks remain hidden underneath the ice on the surface of the water until warm weather arrives and the ice begins to melt. At this point the sticks and branches become visible, and often extend several feet out from the lodge. These sticks will not go to waste, but will be used for dam and lodge repairs. (Photo taken standing on lodge.)

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.


Coyote Shelter

2-24-14 coyote shelter 078Like many carnivores, coyotes do not have permanent homes, other than the maternal dens in which their young are raised. After being active at dawn and dusk (as well as occasionally during the day and night), they are apt to rest, curling up in beds they make in the snow right out in the open. However, they will take advantage of a sheltered spot, such as this hollow stump, if it presents itself. Tracks leading into and out of this stump, in addition to many hairs on the ground inside it, left no question as to what canine had sought shelter here from the cold, winter wind.

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.


A New Book for Budding Naturalists

COVER-BeaversBusyIs there a youngster in your life who might love his or her own book about beavers? My third children’s nature book, The Beavers’ Busy Year, has just been released. Having been an ardent admirer of this rodent for many, many years, it is gratifying to have had a chance to instill a love for beavers in youngsters age 3-8 with this non-fiction book. The adaptations of beavers’ noses, eyes, ears, fur, feet and tails are highlighted in the text and photographs take the reader through the seasons of the year from a beaver’s perspective. Activities at the end of the book engage children in matching photographs of various beaver signs such as tracks, scent mounds and incisor marks with written descriptions. There are also activity/informational sections on beaver tails, beavers as engineers and creators of habitat for other wildlife, and dam building. It should be available at your local bookstore, but if not, I’d greatly appreciate your letting them know about it. Thank you!


Opportunistic White-tailed Deer

white-tailed deer and nip twigs 008One of the most obvious signs associated with porcupines is the presence of “nip twigs” on the ground – severed tips of Eastern Hemlock branches dropped from above after porcupines have eaten the buds off of them. It usually doesn’t take long for White-tailed Deer in the area to detect this easily-accessible source of food. Tender tips that would be out of reach without the assistance of porcupines are quickly consumed by White-tailed Deer. Look for deer tracks and scat beneath trees in which porcupines are feeding. (Note wide porcupine path on left leading to den tree. All other trails were made by deer.)

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.


Red Foxes Preparing Dens

2-25-14  red fox den 013Red Foxes will be begin giving birth in about a month, so the time for preparing their den has arrived. While it’s never very hard to see a fox den (due to the pile of dirt at its main entrance), they are most obvious now, when the dirt removed by the foxes is conspicuous against the white snow. Red Foxes seldom dig their own den. Rather, they take over a woodchuck’s abandoned burrow, or, in some cases, forcibly drive the woodchuck out (and sometimes devour it, as well). They den in woodlands as well as fields, usually on a sandy knoll where they can observe the surrounding territory, and where their den will be well drained. Most dens have one or two main entrances. The tunnel usually slants downward to about four feet beneath the surface and then extends laterally for 20 to 30 feet and resurfaces. An enlarged chamber along the main tunnel serves as a maternity den.

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.


Follow

Get every new post delivered to your Inbox.

Join 2,892 other followers