One saying runs:"The caterpillar does all the work but the butterfly gets all the publicity." And that's surely true when it comes to blogging, where caterpillars barely get a mention.
Very often bloggers are taking photographs of butterflies, and talking about how to get the perfect shot. But sometimes they are just marvelling at their sophistication as an organism, or at their short and fragile lifespan.
Often, also, they are interested in the insects as an ecological indicator, or discussing how they might do their bit to boost the population.