Today I got to go outside with three inquisitive young animal trackers. Mrs. Rickman had these kids read a book on animal tracks, so I was invited to take them out along the creek to do some animal tracking! Of course, I felt the need to involve some technology, so I brought along the Vernier LabQuest and GPS sensor. I also brought along my iPhone to use a GPS app called Trail Guru. Basically, we tracked ourselves as we wandered from the school, to the creek, and back to the school. I’m still investigating how accurate the Vernier GPS really is. I have used Trail Guru extensively, so I wanted to run a side-by-side comparison. I did complete a post on the Vernier GPS sensor here if you would like to see what it looks like and read the preliminary tests.
Our Fearless Trackers

We had a beautiful day to go tracking. We headed out of the school and worked our way down the tree line to the creek. We found plenty of tracks along the way. The first set of tracks that we found were coyote tracks! Below the kids are following the fairly straight trot of the coyote.


Below is my faithful GPS tracker using the Vernier LabQuest with the GPS sensor attached to his hood. I have found that it is important to keep the sensor away from the main unit so that there isn’t any electrical interference between the two.

We found several different animal tracks. The kids learned about tracking terms such as gait, track, print, and stride. They also learned how to tell if the animal was hopping, running, or walking. In our short little hike, we found the tracks of coyote, deer, squirrels, cottontail rabbits, and rodents.
Below the kids are using waterproof tracking cards from North Woods Guides. They are fantastic identifying tools for young trackers. If they drop them in the snow, they will be just fine. They are also quite durable and will not easily get bent.

Every time we found a track, they were down on their knees checking their cards. Another thing they learned about using the cards was to count the number of toes on all four feet. Some mammals have four toes on their front feet, and five on their hind feet.

Squirrel Track

Rodent Tracks show evidence that they were eating and harvesting seeds from this plant.

A tiny set of rodent tracks

Our GPS pilot “Radar” held firm to his job!

Once the kids got tired, we hiked back up to the school, got our snow gear off, and uploaded our GPS data from the LabQuest and the iPhone onto the computer. The comparisons were interesting, yet not surprising to me. Below is the map showing our path using Trail Guru on the iPhone. It tracked the path we went exactly from the school, down to the tree line, along the creek, back down the creek, into the neighboring field (with permission), and back to the school. It worked great!

However, the Vernier LabQuest GPS sensor had some issues. Spiking occurred in two areas on the map, indicating some interference of some kind. It also did not register our path from the school to the tree line. It did register our path from the tree line back to the school though. I noticed that both spikes occurred when we were around really tall trees. Perhaps the trees had caused the interference.

At this point, I can only conclude that the Vernier GPS sensor should only be used in open areas if maximum reliability is to be found. The iPhone GPS did an excellent job at tracking us, but in dense woods, I have had problems with that as well on past hikes. More than likely, I wasn’t near one of the AT&T towers when I was using it. I guess the only way to beat that is to actually learn the “ancient” art of map and compass reading. All in all, we had a fabulous hike, found some great tracks, and wore down the kids’ energy levels. Parents, you can thank me later:))