Studying primate emotions out of the lab: Adding an infrared thermographic camera in the basic fieldwork kit of primatologists?

• Infrared thermography (IRT) is pioneered as a fully non-invasive, contactfree technique to examine changes in emotional states

• IRT has been used successfully to measure emotion-related changes of surface skin temperature in many domestic species and captive nonhuman primates

• IRT has been well-tested in lab and captivity

• It is time to go out of the lab to address new questions in more

ecologically-relevant contexts

• However, in the wild, many environmental factors and constraints linked to a highly specific equipment can affect the accuracy of the IRT

measurements

• This study aims at highlighting these factors and giving some solutions to control their potential impacts on IRT measurements