Mesa Verde Winter Ecology Hike

In 2011 and 2012, Mesa Verde National Park in southwest Colorado is encouraging winter visitors by grooming the snow in some areas for snowshoe hiking and cross country skiing. A new guided hike was offered on January 28, 2012 on Winter Ecology at Mesa Verde.

This hike was offered in the Morefield Campground area where the campground loops are part of the groomed area. The groomed campground loops also provide access to the three Morefield campground trails. Another groomed section is named the Meadow Bliss Trail. The Meadow Bliss Trail is a new route that hasn’t been identified on the park maps before now.

There was no charge for this guided hike and during January and February 2012 admission to the park is free to encourage more public use. The trailhead for winter hiking is near the Morefield Campground stores and gas station.

The first hour of the three hour program was an introduction to tracks and tracking. Tracks by themselves can be difficult to identify but the stride and straddle, or length and width, can give a clue to the size of the animal. A process of elimination led the group to conclude that these tracks might be a coyote. This hike was led by two Mesa Verde Wildlife Management rangers and one of the Interpretive Rangers, so there was a wealth of expertise.

Further on, another similar looking set of tracks was thought to be Bobcat. Bobcat tracks tend to be circular while Coyote are more oval shaped.  Bobcats and Mountain Lions are both at Mesa Verde but aren’t sighted very often. Tracks might be the typical hikers best opportunity to see a sign of them.
 

Part of winter ecology includes the effect of subtle differences in solar radiation. In the Morefield campground area, the differences in the geology and vegetation of north and south facing slopes are visible. The south facing slopes have Pinon Pine and Juniper forest while the cooler north facing slopes have some Douglas Firs. The south facing slopes are also more jumbled in appearance due to the daily effects of freeze and thaw.

Another factor in track identification is the Gait Pattern. Common gaits include walk, trot, gallop, and jump. Gait patterns include diagonal walking like the coyote and bobcat, and bounders like rabbits and squirrels. Mice are an example of gallopers.

The bounder tracks usually have the rear feet tracks in front of the front feet, as the animal moves its rear feet forward for the next leap. Tree dwellers will show both pair of feet parallel while ground dwellers will have one foot more forward.

Toward the end of the hike, there was a demonstration of the use of motion activated cameras to monitor wildlife in a non-invasive way. This unit was capable of day and night images. There was a discussion of how this type of camera shed some light on the interaction of the elk and the feral horses at Mesa Verde. Images were captured that showed how the horses were aggressive toward the elk and drove them away from one of the water sources.

Part of the hike introduction included a demonstration of how casts of tracks are made. At the end of the hike we looked at a sample cast of a deer track. I had noticed that we didn’t see any deer tracks during the hike even though deer are common in Mesa Verde during the warmer parts of the year. The explanation is that the deer prefer the less snowy lower elevation areas and can easily move down during the winter.

The last demonstration was how plants protect themselves. Samples of Rabbitbrush, Sagebrush, Pinon Pine and Douglas Fir were placed in a zip lock bag and made available for the group to sample the scents. The strong scents indicated the presence of compounds that deter animals from browsing on them.

The total program lasted 3:00 hours. It was about 25 F degrees at the 9:00 AM start and about 35 F degrees at the 12:00 PM finish. This hike was advertised as limited to 20 hikers. Snowshoes were available to borrow for those who didn’t have their own.