Check out the fat reserves in this ruby throated hummingbird! #oVertTCN #diceCT scan revealed large pockets of fat storage all along this teeny body. Fueled by nectar, these birds can double their body fat before migrating, & then lose most of it migrating 100s of miles.

as someone who has studied body composition and how that changes in rodents using QMR, THIS IS SO. COOL.

Bonus hummingbird tongue muscles because what 🤯