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When it comes to studying wildlife, sometimes what you don’t find is as important as what you do.

Over five weeks this fall semester, students in ENS 3300 Wildlife Ecology course tried, and tried, and tried again to capture and study field rats and other small animals in the field behind Loy Farm. Their goal was to collect data on the animals’ species, size and weight to use in lab activities before releasing them back into their brushy habitat. The exercise is a standard lab activity each semester it’s taught.

Week after week, it was the same routine.

Each Monday morning around 8:30 a.m., a small team arrived with Associate Professor of Environmental Studies Amanda Chunco to set more than two dozen humane traps along rows in the knee-high grass. They returned with around 10 more of their classmates at 3:30 p.m. to check the traps — only to find them barren.

“We’ve never not caught a rat,” Chunco said in disbelief the afternoon of Oct. 24. “In the past, we’ve caught too many, 25 or 30, and by the end of the class we’re just releasing them because we’ve run out of time and we already have the data we need.”

Each week, the curiously empty traps made them more determined to try again. “We can try again next Monday if you want to,” Chunco would announce to a chorus of yeses in response.

It wasn’t all fruitless. In the first week, they found a foot-long juvenile rat snake, which they measured and released.

“What’s more fun than catching rats and snakes?” Emma Kaminsky ’25 asked. “Even when we didn’t catch anything, it was still exciting to set and check the traps.”

The serially empty traps led to discussions about the ebb and flow of animal populations, hypotheses about an increase of predators like hawks or even fire ants around campus, and other possible explanations why they weren’t catching the usual rats, mice and shrews.

For those environmental studies majors in the class, it was a preview of what future field research could entail.

“This is how it actually is in real life. Things go wrong or they don’t happen the way you expected. Wildlife research isn’t exactly a very funded field, and it’s a career where you have to try and try again or run studies with the bare minimum,” said Wyatt Payne ’23.

Those barren traps also made room for students to explore topics and subjects they might not have otherwise. Some fun facts gathered this semester: Shrews must eat every two hours to survive; fish can hear; spiders dream.

“I learned a lot about experimental design. For instance, we read a whole study about track tubes, so then we got to make them and put them out here to see if we find anything,” said Megan Green ’23. They set those tubes coated at each end with red and blue dye to track small mammals’ movements on the farm. “Every lab I’ve ever taken has been so structured, so the freedom to study what we want and try what we want has been such a good experience. It makes it really fun that Dr. Chunco allows us to study what we’re interested in.”

“It’s been great to take such an experiential class as a senior,” said Madison Eaton ’23. “We’ve discussed so many potential career paths in this class, and it’s been such a cool way to explore those options now that I’m thinking about life after ���ϲ�����.”

On Monday, Nov. 28, it finally happened. A very hungry shrew was inside a small trap in the drying grass, a tiny DeKay’s brown snake was found near the traps, and — jackpot! — a hispid cotton rat.

They measured the snake. They quickly processed the shrew to release it for survival. They deposited the fuzzy, brown rat into the bottom of a tall, white trashcan and donned leather gloves to handle it safely. The scale and other data collection tools were at hand.

As students reached inside to collect the quite perturbed rodent, it scrambled through their hands and leapt for freedom, disappearing in the tall grass and safe seclusion beneath a pile of farm supplies.

“He bested us all,” came a student’s reluctant admission.

“Oh yeah, he had some fire in his eyes. I could see it.”