Last week the question was: What is this insect on this rapeseed flower?
This is a mayfly. Mayflies are extremely old insects whose origins date back to approximately 300 million years ago. Juvenile mayflies are aquatic but leave the water when they become adults. They have just a day or two to mate before they run out of energy and die. Here is a good site with more info on mayflies.
Here is this week’s question: What happened to these strawberry blossoms?