All images on this website have been taken in Leicestershire and Rutland by NatureSpot members. We welcome new contributions - just register and use the Submit Records form to post your photos. Click on any image below to visit the species page. The RED / AMBER / GREEN dots indicate how easy it is to identify the species - see our Identification Difficulty page for more information. A coloured rating followed by an exclamation mark denotes that different ID difficulties apply to either males and females or to the larvae - see the species page for more detail.
These minute insects have narrow bodies and usually feather-like wings. They collect in large numbers on flowers and may be found in houses, sometimes trapped beneath the glass of framed pictures. They are commonly called 'thunderflies' as they take to the air in still, thundery weather.