Recently there have been two scientific studies which have highlighted how smart bees really are at learning. One of these studies trained bees to pull on a string which gave them access to a sucrose treat. The second study wanted to see if bees could perform a very unnatural task that required manipulation of a tool to get a reward. The bees were shown that the proper location of a yellow ball was inside a drawn circle. The bee then had to figure out how to relocate a misplaced ball back into the circle to gain a reward. Once the bee had learned these tasks they improved significantly each time, taking less time to complete the task. Not only did bees learn these tasks, other bees which were placed as observers could then complete the task themselves on the first try, hence learning the skill from watching a trained bee. This learning could be transferred through many successions of new trainers and new observers. These studies show that bees can learn new and complex tasks which were previously thought to be unique to vertebrates such as mammals and birds and also transfer those skills throughout their colony which may help them adapt in the presence of changing evolutionary pressures (click here to see a video highlighting these studies).
Today I present to you this fly……on a flower. This fly is called a green bottle fly because of the shiny metallic green color of its body. Flies such as these have very important uses in both forensic science and medicine. They are often the first flies to arrive at a human or animal carcass, and this is where they can begin their lifecycle – A female will lay about 200 eggs which hatch and become larvae in 1-3 days, fully developed larvae in 3-10 days, and pupal development takes 6-14 days after which an adult fly emerges. Forensic investigators can use this knowledge to approximate the length of time a deceased has been dead.
These flies (or more correctly, the maggots) are used by doctors to treat wounds which are unresponsive to conventional treatments. They eat away the dead tissue and bacteria, and also secrete antimicrobial enzymes which together prevents infection and allows healthy tissue to grow successfully. Given the increasing resistance of bacteria to known antibiotics, this may just become the medicine of the future. Sorry to give such a literal example of making your skin crawl….
Happy weekend everyone!