If you are looking at the ladybird (ladybug) with the amoeba to the left, the amoeba isn't an order of the magnitude smaller - it would actually be visible by the human eye (bigger than a grain of sand)? Indeed, the amoeba seems the same size as the ladybird's foot?
Similarly, this makes the bumblebee appear smaller than a human finger (the in the adjacent picture), which isn't the case?