I've joined a recreation facility with a big, warm, outdoor swimming pool. Despite the lack of flowering plants, there are always honeybees around the pool edges. In particular, they can be found crawling over soggy dead leaves next to the pool. They're busily looking for something, but what? It's not water; when bees look for water they hover over it and attempt to land. Besides, there are shallow puddles all around. And, oh yes, this is a part saltwater pool, like the Laguna Beach pool.
So what could the bees be looking for? I don't know for sure, but maybe we can guess, based on the behavior of other insects and four-footed animals.
Worker bees spend their lives hunting for and feeding on flower pollen and nectar. Often there are butterflies flying around the same flowers, for the same reason. But butterflies can often be found on the ground — clustering around drying mud, puddles of horse urine or walking around on droppings. Like bees, butterflies feed mostly on flower nectar. So when you live on sugar and water, where do you get your minerals?