user:Abalg / Wikipedia, shenhuifu.org
Propolis (bee glue) is a resinous mixture that honey bees produce by mixing saliva and beeswax with exudate gathered from tree buds, sap flows, or other botanical sources. It is used as a sealant for unwanted open spaces in the hive.
Preview photo credit: user:Abalg / Wikipedia
Sorry, comments are closed for this article.