We are very excited to welcome Dr. Alice Boyle back as a guest poster today. In her previous post, Alice shared some of her adventures from her doctoral fieldwork in Central American, and this week she takes us back to the Caribbean slopes of Costa Rica. For more about Alice, check out her bio at the end of the post.
In 2004, I spent a year doing field work on the wet, Caribbean slope of Costa Rica. It was the 4th and final field season of my dissertation studying altitudinal bird migration. Each month we would work very hard for 23 days, and then my assistants visited beaches and volcanos, while I prepared for the next round of sampling. I also wrote letters to my family during those breaks, and my father urged me to publish them. A while back, I posted excerpts from the April letter. Here, I continue that story with an account of the crazy first week of May as we initiated a nest predation experiment across at 3000 m elevational gradient.
When I last wrote I was just getting ready for the big “nest predation experiment” month. All was going smoothly until the very last minute. Three days before starting to place nests, I went to San Jose to pick up the car*, the last batch of canary eggs, 400 wicker nests, bags of moss, and other weird miscellaneous supplies (for example, tiny decorative ice-cube trays for transport of jelly-bean sized fragile canary eggs). My last stop was to get the baskets that would become “nests”, made to order by a Guatemalan artisan. When I arrived, the store owner started bringing out bundles of NOT the 8-cms diameter cup-shaped baskets I had ordered, but huge pigeon-nest-sized baskets! AGH! Four hundred useless wicker baskets… crisis! The poor owner of the basket store was almost as dismayed as I was.
We tried modifying the baskets, savaging one with an exacto knife. It disintigrated into a sharp mess, and poor Emilia (the store owner… we were on a first-name basis by this point) got badly cut. Eventually, I realized there were three alternatives: 1) somehow find 400 smaller baskets elsewhere, 2) use some other cup-shaped product (…like a cup?), and get really creative with paint and glued-on moss as to make them look as nest-like as possible, or 3) give up. Option 3 wasn’t really an option. I had way too much invested. Aside from hoarding canary eggs for over a month**, I’d found a cheap vehicle to rent, gotten extra permits, and had a friend flying in to fill in a 2-week personnel gap. Option 1 really seemed pretty unlikely too. It had taken 2.5 months to get these baskets, and I had only 3 days left to find replacements. After deciding I had little option but to look for some other cup-shaped object, Emilia appeared with a hopeful look, holding a different style of small basket. Not quite so perfectly nest-shaped as the ones I’d ordered, but small and definitely better than a plastic cup! She only had 149, but the maker lived in the Talamanca mountains in Costa Rica. He had a phone and answered her call. I only heard one side of the conversation: “you know those little baskets you make me? how many can you make by Monday? ………. and how many more by Thursday? ……….. well, how soon could make an extra 250 for me? ……… look, we have an EMERGENCY here! Can’t you HIRE someone to help you!?……” And so we resolved the problem. They cost twice as much and I had to make 2 extra trips to San Jose to pick them up by installments, but it worked. This little glitch meant that our grueling itinerary now included late-night nest preparation before they could placed out in the forest… at 8 sites over a 3000 m elevational gradient. Unfortunately, the nest glitch wasn’t the only set-back.
Three days later we started wiring fake nests into trees in the forest, each containing a real canary egg and matching plasticine egg***. As we left the La Selva lab the first morning, it started raining hard, and it didn’t stop for the next 8 days. During that week, so much rain fell that a car was swept off the road and landslides closed the highway between San Jose and the Atlantic lowlands. All rivers were transformed into roiling muddy torrents and there was massive flooding. At La Selva, dorms were evacuated, access to the station was by boat, and the river reached its highest level since 1970. Meanwhile all the rain was falling on us.
After the two lowland sites, we headed up to Rara Avis**** for the 650 m and 800 m sites, but our reservations at the station had been forgotten and the tractor (only transport option) wasn’t going to leave until late. That meant we got a day behind schedule, and I was starting to panic, until we took on ‘Crazy Mike’ as the 5th member of our team. Mike was a volunteer guide but didn’t get along with his new boss. When he heard about our nest, weather, and tractor-delay woes, he simply quit his guiding gig and came along for the adventure. Mike was a godsend! He rarely stopped joking and never let the rain get him down. True, he did also drink an incredible amount. But he was tireless in machete-ing his way along a compass bearings through treefalls and vine tangles. So we caught up, doing 2 sites in one brutal 13 hour field day.
Next day we were back down on the tractor, and around to a different side of the park, back up the mountain to higher elevations. We got behind again because the nests weren’t ready, and now were working in cloud forest where the rain was distinctly chilly. Luckily we were able to spend a night in San Jose where we all got hot showers, ate pizza, and drank copious amounts of beer! Had we not had to prepare more nests after dinner it would have been a fun party. But the schedule was relentless. The next day we went to the highest site—2800 m near the peak of Volcan Barva. The drive was awful. With every bump in the road I thought we were going to destroy the suspension. With five of us, nests, spray paint, wet rain gear, half eaten food containers, muddy rubber boots, gross packs, and canary eggs, the Bronco was the definition of sordid. But we made it up, and comforted ourselves with strong liquor purchased in San José.
The next morning there was a slight rain respite. Everyone got to see quetzals and I was feeling optimistic… the end was in sight. Only our last day and our last site remained. Getting there involved looping around Barva volcano on country roads, ending on a red dirt road leading to a little-used park access point. The drive was long, rainy, and very uncomfortable. We were exhausted. The little farmhouses seemed unoccupied near the end of the driveable road, so I continued farther than I should in hopes of finding a safe place to leave the full car.
And then, I drove into a ditch. Yup, right into a deep ditch. The whole right side of the Bronco was SERIOUSLY stuck. I have been stuck enough times to know when it is serious. We had no shovel nor anything other than sticks and rocks to help us. After probably 1.5 hours, many failed strategies, and admirable teamwork, we got the Bronco out! But we had lost a lot of time, and when I made it clear we were still going to try to get into the site and get the last batch of nests placed, there was near mutiny. Obviously, no one wanted to do anything other than shower, do laundry, and collapse into a clean bed. It was now early afternoon and we had to walk over an hour to the forest. Eventually I decided to leave Mike with the car and get as many nests placed at this site as possible. Even if we didn’t get all 50, we wouldn’t lose a whole site. So we did it, and as we hiked out with the last light, the clouds finally parted and rain finally stopped. We had panoramic views of Poas volcano and the whole drenched Atlantic lowlands almost as far as the coast. NOW our woes were over, surely!
The Bronco had one last devilish trick in store, however: loss of power brakes and a mysterious stalling problem. Somehow the strain of getting out of the ditch had caused new problems. Whenever I braked or changed gear, we stalled. For two dark, foggy hours on winding mountain roads, I was constantly stalling and roll starting, terrified of losing brakes entirely and peeling off the cliff into the abyss. The headlights pointed unhelpfully into space instead of illuminating the road. And as a last straw, the driver-side windshield wiper stopped working. We limped into Puerto Viejo, completely drained from stress and exhaustion. Fortunately, the pizza joint was open and had an ample supply of cold beer, despite the floods that cut off both water and sewage service. It wasn’t til 9:30 that we finally found our beds at La Selva.
That week was, without doubt, the most stressful and dangerous week of field work in my life. It was crazy and hectic the whole rest of the month, as part of the crew rechecked all the nests in sequence repeatedly over subsequent weeks, while others continued our monthly bird and plant sampling. But thankfully, fieldwork has never been quite that crazy since. It is good to know what you can tolerate. And it is good to remember the hardship, when, during long days in front of my computer, fieldwork seems to become a romantic memory. Yes, being in the field work is amazingly fun and rewarding, but it also stretches you to the max, testing your ingenuity, tolerance for discomfort, ability to remain cheerful, and to make really hard decisions that often seem to pit personal safety against scientific discovery.
* I had an incredibly tight budget! My entire PhD was completed on funding from small grants, so there was no way to get a commercial car rental. Fortunately, I found an old 4×4 Bronco to rent for cheap from a friend who was thinking of getting rid of it.
** Several months before, I had cultivated a relationship with a canary breeder who set aside all the infertile eggs in the refrigerator for me
*** We used plasticine (modeling clay) eggs to determine the types of predators attacking nests
**** Rara Avis was the mid-elevation field site where I did a lot of my PhD research.
Alice Boyle is now an Assistant Professor in the Division of Biology at Kansas State University. She continues to study the evolutionary ecology of tropical birds, but has also fallen in love with the tall grass prairies surrounding her new home. Consequently, she has been chasing Grasshopper Sparrows for the past few years and learning just how different prairie ecosystems are from tropical wet forests.