Super cute little hummingbaby, he is in torpor (sleeping state) and it sounds like he is snoring…which is sooooooooooooooo adorable but he is not really snoring. You can read more below…
According to the person who posted the video,
a female Amethyst-throated Sunangel (Heliangelus amethysticollis) sleeps in Peru. (check out pictures added below)
Alright, Thank you Reddit for blowing this up. Lets clear a few things up here. The bird is in a container that is attached to machines that measure how much oxygen the bird is consuming. The noise you are hearing is the hum of the machines in the background (the main one being the FoxBox… http://www.sablesystems.com/products-prod_foxbox.html?sub=details). The noise is actually a lot more quiet than it seems, for whatever reason my camera picked it up and made it sound a lot louder. This experiment was performed with the guidance and supervision of some of the top experts in tropical ornithology. The investigation was fully permitted and performed in a world renowned research facility. This bird was not harmed whatsoever, it was fed with sugar water throughout the experiment and was released safely. All of the hummingbirds measured like this consumed a very low amount of oxygen at a very stable level as compared to other, larger birds, which means that they were in torpor, or a state close to torpor. After the experiment was done, I watched the bird fly away myself, it was fine. And yes, I know its not actually snoring, it just kinda sounds like it. I have been studying ornithology for years and am currently a Masters student studying birds. The welfare of birds means the world to me, and I am dedicating my career to their conservation.
see pictures of hummingbirds from this project: http://s1152.photobucket.com/albums/p489/forrestertr7/Hummingbirds/
You should DEFINITELY go see the pictures too! =)