The birds and bees according to trees. This is the time of year when pollen counts make the news, and cars, sidewalks, and patios are covered in a layer of yellow dust. It is a sure sign of spring but for those who suffer from allergies, it can be a sign of the end of being able to breathe comfortably until the pollen subsides. So what exactly is pollen and why is it so profuse in spring? Click here to read more about this topic from the arborists at Traverso Tree Service.