https://phys.org/news/2018-06-animals-shifting-day-night-people.html

The latest research found even activities like hiking and camping can scare animals and drive them to become more active at night.

"It suggests that animals might be playing it safe around people," said Kaitlyn Gaynor, an ecologist at the University of California, Berkeley, who led the study. "We may think that we leave no trace when we're just hiking in the woods, but our mere presence can have lasting consequences."