Andean Bears: Field Research Continues

Posted at 9:48 am July 1, 2009 by Russ Van Horn

Cusco cowboys are ready for a parade.

Cusco boys in cowboy costumes prepare to march in a procession.

I’ve left the field and spent some time on vacation around Cusco, Peru, before returning to the U.S. This was a short trip to southern Peru, but it was as productive as I could expect, and I believe it will prove beneficial later this year (see previous post, Andean Bears: Back to Peru). With the help of Pedro Centeno, a colleague from the Botanical Research Institute of Texas, I left some camera traps for 10 days at the same sites we monitored last October through December (see post, Andean Bears: Ready for Their Closeup?)

When we left the cameras, the fig trees were fruiting, and the bamboo was flowering nearby, so we expected to see that different animals would pass by. To our great surprise, when we downloaded the photos we found fewer photos per day than in the past. The photos were primarily of clouds and fog moving through the dense forest, but there were also snapshots of agoutis and ocelots.

Once we’d spent a few days walking in the forest and had convinced ourselves that we were ready to hike at higher elevations, Pedro and I set off for a more distant, and logistically challenging, valley. I believe that in my last post.

I spoke of hoping to rent a pickup truck for part of the trip. Well, our timing was nearly perfect. Perfectly bad, that is. I’d thought the festival of Qoyllor Rit’i, which takes place just over the crest of the Andes near the town of Ocongate, would take place a week after our trip. Unfortunately, it took place earlier. In the future I obviously need to pay more attention to the passing of time. Qoyllor Rit’i is a major annual event in this part of Peru, and many people leave their villages to attend the festival, especially people who have ready means of transportation, like pickups. So, we were unable to rent a vehicle, and once again we took a packhorse up the valley.

Considering that I’ve been based in San Diego for the last several months, I don’t think I did too badly on the trail, but it became obvious that we weren’t going to reach our destination before dark. Since this is wintertime here, and it can drop below freezing at night at these elevations, hiking after dark was not exactly something to look forward to with eager anticipation. Fortunately, we met a villager who just happened to have some riding horses with him, available for immediate rental. It must have been funny to see me riding bareback on one of the small horses, with my big feet dangling down. It definitely cheered me up!

Over the next two days we met with members of the local community government and members of the local community and discussed the possibilities for conducting bear research in the area. The community leaders and all the people we talked to were receptive to our working on their lands, which was good news for us. As often seems to happen, good news was followed by bad news. We visited the community’s cornfields and saw first-hand the damage that wild animals were causing to the crop. Based on one quick transect, I estimated that about 25 percent of the crop has been damaged by birds, small mammals, and bears, and there’s still a month to go before all the corn is harvested!
I didn’t see a bear eating corn. I did, however, see a young bear in a tree next to the fields. This is the second wild Andean bear that I’ve seen, and both bears were in or near cornfields. Not all Andean bears eat corn, but conflict with humans is definitely an issue for their conservation.

In order to speed our progress, we rented riding horses for the trip back to the main road. This time there were saddles, although I couldn’t have gotten my hands into the stirrups, let alone my boots. When I was a kid, I wanted to be a cowboy. My parents have photos of me with a grin stretching from one jug-handle ear to the other, wearing a western-style shirt and cowboy hat, gifts I received for my birthday. On this trip I was forcefully reminded that I’m still no cowboy, but I am gaining a better appreciation for why cowboys are bow-legged!

I plan to return to Peru in around two months to build on the relationships we’re forming with local people and begin collecting some real data. Until then, happy trails to y’all.

Russ Van Horn is a senior researcher with the San Diego Zoo’s Institute for Conservation Research.

You can follow any responses to this entry through the RSS 2.0 feed. Scroll to the end to leave a comment. Pinging is not allowed.

5 Responses to “Andean Bears: Field Research Continues”

  1. Joy in Kansas says:

    Glad you’re enjoying your trips to Peru, Russ. My family lived there for a year while I was in grade school, and I’ve always wanted to return. Wish I could stow away as a research assistant! I enjoy hearing of the animals you see during your research trips. It brings back fond memories of watching a sloth in the trees, or seeing a large iguana amble by, as well as the many small lizards and tree frogs that kept sneaking indoors. I have great hopes you will get photos of those lovely bears, soon.

  2. nancy from michigan says:

    russ, as always it’s a pleasure to read your updates about your travels in peru. at least you did get to see a couple bears! i laugh when i visualize in my head the scene of you riding bareback on a small horse with your long legs dangling just above the ground!! very funny! awkward maybe, but better than walking all the time. are you extremely tall, or are the peruvians very small!!!??? lol anyway, keep your posts coming as they are enjoyable, laughable, and informative to read!!!!!!!……………………………………………………………

  3. njr_sd says:

    Any idea what triggered the cameras on the ones that only showed clouds and fog? Glad to hear you got to see a wild bear, not so good that it was close to the corn fields.
    Is this the study area where you were going to deploy the environmental/temperature sensors?

  4. Jeremy says:

    Russ,

    Thanks so much for the research you are doing to help Andean Bears and to work with the local people to understand and respect the importance of the bears. Do you know if the bears raided cornfields would be turned away by peppers near the edge of the cornfields? I have heard of that working in India and in Africa with crop-raiding elephants. I do appreciate hearing about your adventures in the field and I’m proud of the SDZ for supporting your research.

  5. Russ Van Horn says:

    To #3 (njr_sd)
    These remote cameras (camera ‘traps’) are triggered by either movement or heat anomalies. So, although we choose the sites carefully, it’s possible that environmental conditions and weather events cause the cameras to take pictures without animals being present. We suspect that wind, blowing either clouds or branches, provided enough movement to trigger the cameras, resulting in photos that don’t show animals. It’s also possible that the cameras were triggered by fast-moving insects. The cameras are set to take three photos in rapid succession every time they’re triggered. In the past, we’ve had photos taken of flies or moths flying in front of the cameras. Some times the insect was visible in all three photos in a series, but in other photo series the insect was visible in only one or two of the three photos. So, although the cameras have a response time of less than a second, it’s possible that an insect, flying just at the edge of the field of view of the camera sensor, might trigger the shutter and then fly out of view before the photo is taken.

    Now that we’ve strengthened our relationship with the local stakeholders, we’re planning to place temperature and light sensors into the forest near the camera traps. Data on environmental conditions will help us address hypotheses regarding animal behavior and will help our botanical collaborators understand the seasonality of plant reproduction.

Leave a Comment

Enter your comment here. Comments are moderated and will appear after review by the editor. Comments must be in English. They may be edited or deleted if they don't pertain to the Weblog topic. Comments with hyperlinks are not allowed.