Do ants yawn? My five year old asked me and I can not seem to find anything on it.

Hi. Yawning involves inhaling and exhaling. Since insects don't have lungs, they are physically incapable of anything even resembling a yawn. All the organisms which are known to yawn are among the mammals, with a few unproven claims that some lizards may also yawn. Yawning has been shown to be "contagious" in chimps and humans, but I don't know if it works with dogs, cats, or other yawning mammals.

Thank you! She has been asking for about a week. This should make her happy.

http://www.abc.net.au/science/news/stories/s769094.htm

"Insects don't have lungs, so how do they breathe? Using tiny air sacs no-one even knew existed, according to American scientists who have taken the first close-up views of the process."