The hummingbird is the hungry birds in the world, one of the highest metabolic rates, food supply is equal to 77 times as much as most human eats, heart rates up to 1,260 beats per minute, breathing rate is about 250 breaths per minute even at rest.
Reference : San Diego Zoo Wildlife Alliance (web site) read more : https://animals.sandiegozoo.org/animals/hummingbird https://www.ncbi.nlm.nih.gov/pmc/articles/PMC1325055/#:~:text=Hummingbirds%20have%20one%20of%20the,per%20minute%20even%20at%20rest.