Greatest concentration of insects
- Who
- Unknown
- What
- 514374 square kilometre(s)
- When
- 01 January 0001
A huge swarm of Rocky Mountain locusts (Melanoplus spretus) in Nebraska, USA, on 20–30 July 1874 covered an area estimated at 514,374 km² (198,600 miles²) as they flew over the state. This swarm of locusts contained 12.5 trillion insects, weighing 25 million tonnes (50 billion US lb, 56 billion UK lb).
Ironically, and for reasons that are still unknown, this species suddenly vanished in 1902 and has never been reported again.