Makes perfect sense honeybees would be in the mix. The pine tree glue referred to in the article is the stuff honeybees collect to make propolis. Propolis is "bee glue", they use to seal hive holes, cover attackers, and use anywhere like we use duct tape. It tastes a bit like dentyne, and is used in many antiseptic formulations for handcremes and other cosmetics.
Thanks C210N!