What is a common cause of bee colony collapse?

A common cause of bee colony collapse is high levels of pesticides in the environment. Pesticides, particularly neonicotinoids, have been shown to be particularly harmful to bees. They can affect the nervous system and impair the bees' ability to forage, navigate, and reproduce. Additionally, exposure to pesticides can weaken the bees' immune systems, making them more susceptible to diseases and other stress factors.

While fluctuating temperatures, overcrowding, and lack of water sources can contribute to colony stress and impact hive health, they are typically not as definitive or widespread factors leading to significant colony collapse compared to the direct and harmful effects of pesticide exposure. The role of pesticides is well-documented in research related to bee health, making it a primary focus in discussions about declines in bee populations.