I live in Vancouver and I have tomato, rhubarb, and blueberry plants that have a ton of these little black leaf shaped things on them that stick to the leaves and tomatoes on the plants. Is anyone here able to identify what these are or know how to control them? They don't appear to be doing harm to the plants from what I can see but they are all over the place on these plants. We had a very hard rain last night so I think there are less in the photo than what there have been prior to the rainfall. It doesn't look like they move so I'm questioning if it's the droppings of another insect but I cant see anything else on the plants... Any help you can provide is very much appreciated.