(STUFF) — A huge swarm of insects big enough to cover everything from Whangarei to the Waikato appears to have been caught on weather radar.

The MetService says that if people watched their radar imagery overnight or this morning, they may have seen what looked like a lot of light precipitation over the northern half of the North Island and west of Auckland.

But they know there was no rain anywhere.

They are not quite sure what it all was.

Note: Read our discussion guidelines before commenting.