From the Aeronautical Information Manual

from https://www.mdpi.com/2071-1050/15/2/1722

(Silverberg et. al, 2013)

via https://tdlc.ucsd.edu/images/facescheung.jpg

Ended up sending these screenshots from Fusion 360 to a friend I was helping trying to figure out how to modify this model to make it easier to 3D print.

Essentials of ecology, 3th edition page 229

physics is fun guys i swear

"Physiology of Behavior" by Carlson chapter 13 "Ingestive Behavior: eating"

EDIT: Reading the original paper it appears that they did this procedure on 15 PAIRS of rats. Which also means there were probably closer to 30 pairs because they would have had to do testing and preliminary training on the procedure during pilot studies before the actual study.

arxiv: 1802.04208v1

doi:10.1242/jeb.136036

Sorry for bad angles, had to get a photo quickly before I got in trouble for having my phone out.