Blue-winged Wood Gnat

Size 4mm. This wood gnat is quite small and can hardly be seen. It was found on our wooden fence, basically looking like a dark spot in the weathered wood. The blue shimmering wings show a pattern like a dark wave. The cover the abdomen and while resting seem to be folded over each other. The wings and also the antennae are quite hairy. Eyes are very close to each other. Wing stumps are prominent. Legs are long with multiple joints.