A full house

Bogong moths heading south
to the granite tors of the Snowy Mountains
are sometimes deflected by storms and bad weather.
In NSW millions of them have been found
strewn along coastal beaches.
In the late 1860s in a Sydney church
the Reverend Mobbs had to cancel services
because the sudden invasion left no room
for the congregation.
He counted 80,000 moths
on the windows alone
relaxing in a summer torpor.
It was only a small church
but still he was assiduous in his moth count.
Obviously he'd never experienced
such a large church attendance before -
densely packed with moths
it was a full house.