６月１７日配信のBBC-Earth News に 「The secrets of ant sleep revealed」のタイトルで 眠りについてのおもしろい記事があったので よろしかったらお付き合いくださいませ。
（ 原文 ）
Queen ants dozily dream, while worker ants are forced to get by taking power naps, the first study of the sleeping habits of ants has revealed.
Queen fire ants fall into relatively long, deep sleeps and kip for an average of nine hours every day. By contrast, workers sleep just half as much and get to rest by taking hundreds of short power naps. This division of rest may help explain why queens live for years, while worker ants typically only live for months. It also ensures that enough worker ants are awake at any one time to protect and serve the colony. Deby Cassill of the University of South Florida in St Petersburg, US teamed with colleagues Skye Brown and Devon Swick of the same university, and George Yanev of the University of Texas in Arlington, US to study the sleeping patterns of the fire ant Solenopsis invicta. "I decided to see just how lazy the queens really were," says Cassill. She and her colleagues raised a colony of fire ants in their laboratory, and created an artificial chamber containing three queens, 30 workers and 30 large larvae. They placed a glass cover over the top of the chamber, allowing the ants to be continuously filmed from above. Because fire ants generally live underground, the researchers expected that their sleep patterns would not be determined by light and dark cycles. And that is what they found. Workers fell asleep at irregular intervals, and not at the same time. But the sheer number of incredibly short naps they took was striking. On average, a single worker ant would take 250 naps each day, with each one lasting just over a minute. That equates to 4 hours and 48 minutes of sleep a day. That also meant that 80 per cent of the workforce was awake and active at any one time. "The large number and short naps by workers means that jobs in the nest never go unattended," says Cassill. "There is always a worker available when the need arises. When work is slow, workers sleep more." Equally striking was the contrast between the sleeping habits of the workers and of the queens they served.