the Industrial Revolution, at a time when Manchester was taking a leading role in new forms of mass production, and symbolises Mancunians' hard work during this era and Manchester being a hive of activity in the 19th century. Following the Manchester Arena attack on Monday 22 May 2017, the bee emblem gained popularity as a public symbol of unity against terrorism, appearing on protest banners and graffiti. The song "Worker Bees", by Canadian rock band Billy Talent (from their 2006 album, Billy Talent II), criticizes the actions of the U.S military during their ongoing invasion of middle east; comparing it to the hive mind mentality of worker bees. Other social bees There are many types of eusocial bees, including bumble bees, stingless bees, some orchid bees, and many species of sweat bees, native to all continents except for Antarctica, that have workers. Workers in these other bee lineages do not show significant morphological differences from queens, other than coloration or a smaller average body size, though they are often quite different in their behavior from queens, and may or may not lay eggs. See the respective articles for these lineages for details. References External links Beekeeping Bees