
A View From Aerie Mountain
Natural History, Bushcraft, Outdoor Survival, Grizzly Bears, Human Ecology, Montana and more.
Wednesday, January 25, 2012
Winter Survival & Bushcraft Workshops for 2012

Sunday, December 4, 2011
La Nina
Two climate events set the stage for this dramatic weather year; a “negative” phase of the Arctic Oscillation in which high pressure in the far north and mid-latitude low pressure allowed storms to head south, and a phenomenon known as La Nina. This term means “little girl” and is the opposite phase of the better known El Nino pattern. With a La Nina, waters of the equatorial Pacific tend to be significantly cooler than normal. In North America, this translates into colder and wetter winters in the northern states and warmer, dryer winters in the southwest. El Nino tends to manifest the opposite of this. The effect of climate change with these patterns is not well understood or agreed upon. What is known for certain is despite the intensely bitter winter of 2010, it was the 10th warmest year globally, with the lowest level of arctic sea ice ever recorded.
This season, La Nina is predicted to return and produce similar conditions as last year, though perhaps not quite as severe. Many people have mixed feelings about winter. Plenty who visit Montana in the warmer months wouldn’t be caught dead here in January. For me, it is a time of natural beauty and introspection. The landscape is mostly dormant now but the beasts that are active can be easily tracked through snow. It can be a violent season too, especially on the Front with its killing winds and arctic air masses that can lower the mercury to -40. After it stops blowing however, I often put on snowshoes and head outside to stroll through the woods, usually at night. There is something intensely purifying walking through the deep cold in a nighttime landscape with its snow mantle. This time of year, the Milky Way is within reaching distance and a fortunate winter wanderer could see the enchanting Aurora Borealis. It doesn’t get much more real than this.
A La Nina this winter will likely pile snow up in the mountains of Montana; the stuff that drives our rivers, hydrologic systems and just about everything else in Nature. I can’t help thinking about dire predictions of a world without this most austere and awe inspiring season. What could be lost in the way of human culture and ecological systems is heartbreaking. Perhaps it’s best then, to consider each winter storm, arctic cold front or La Nina as gifts; moments of grace for our uncertain future.
Sunday, October 9, 2011
23.5
Monday, August 29, 2011
Birds of the Front: Sandhill Crane
Photo by Bob Martinka
Friday, July 29, 2011
Walking With Sibley
Sunday, May 29, 2011
Survival & Bushcraft Workshop June 25th

Sunday, May 15, 2011
Long Billed Curlew

Among the many avian rites of spring on the Rocky Mountain Front, is the return of our Long Billed Curlews (Numenius americanus) to their breeding prairie lands. It’s a less gaudy event than the typically massive Snow Geese migration, but spectacular in its own way. I have found these creatures “staged up” in concentrations of nearly a hundred as they come into the country. This doesn’t last long though; the birds will quickly pair up and become territorial for the nesting process. Long Bills are the largest sandpiper in North America and one of the largest on earth. The females are significantly larger than the males with longer bills. These birds come back to Montana’s grasslands between April and May from coastal or inland-valley wintering areas in California, Central America and the Gulf of Mexico. Long Bills are ground nesters; a small depression is created in rather exposed areas of short-grass prairie and lined with available soft material. Four-egg clutches are most typical. After a nearly 30-day incubation period, the precocial young are born and soon ready to move.
The ridiculously long bill is actually a well-adapted foraging tool in both its wintering and breeding habitats. In Montana, much of what Curlews consume are grasshoppers and other insects, which can occur in great abundance. However, life for ground nesting, grassland birds is especially precarious; so not long after hatching, the Curlew parents will often move the new family to the cover of taller grass as a precaution against predation. In about 2-3 weeks, the female will essentially abandon the young, leaving the remaining chick-rearing to dad. Many people find the plaintive cry of these birds to be strongly evocative of Montana’s wide-open, native grasslands. Until recently, very little was known about migration routes and other basic facets of this bird’s ecology. Nearly all wildlife agencies in the US, Canada and Mexico consider Long Billed Curlews to be an “At Risk” species. Once again, this speaks largely to our cultural bias against grasslands as anything other than grain-growing, energy-producing areas that lack aesthetic appeal or biological value in general.
But nothing could be further from the truth. The grassland habitats upon which Curlews and other species depend are some of the richest, most rare and threatened ecosystems in all of North America. Because only 1-2% of relatively intact, native prairies exist on the continent, the concern for long-term viability of many creatures is serious. Ecologists estimate a global population of about 160,000 individual Long Billed Curlews. Although this is greater than some earlier estimates, the newer research still points to an overall decline and suggests a need for immediate, international conservation measures.
My connection with Curlews is strongly associated with the Front. I’ve watched these birds go about the business of life in that beautiful but unforgiving landscape for years now. High winds and predictably-unpredictable spring snowstorms probably kill birds with some regularity. Then there are the many eaters of Curlews; I have witnessed nest raidings by ravens, coyotes, badgers and foxes as well as the outright slaying of adult birds by falcons and Golden Eagles. And it’s hard to watch, knowing what we know about the sober conservation challenges for this and all grassland species that lie ahead. If we consider the stress of natural predation in addition to habitat loss due to wind farms, oil and gas development, invasive species and habitat conversion of prairie to crop production, things can look dire indeed.
But all is not lost. Some of the finest remaining prairies in North America are right here in Montana and many organizations are active in promoting their conservation. A fantastic educational opportunity for birders is Montana Audubon’s upcoming Wings Across the Big Sky Bird Festival, which will be held in Glasgow this year, from June 3-5. Participants can learn about Montana’s extraordinary grassland birds with expert-led field trips, lectures and other fun activities. For more information, please contact Montana Audubon at 406-443-3949 or visit their website, www.mtaudubon.org.
David Cronenwett is a writer, naturalist and wilderness survival instructor from Choteau, Montana.
