A scurry of squirrels
How to remember: First, just the one squirrel scurried onto our blanket. But then an entire scurry of squirrels scurried up to us. We never got to finish our picnic because we ran away.
A husk of hares
How to remember: The husk of hares ate corn husks at dusk, wondering whether a colony of rabbits would join them.
A troubling of goldfish
How to remember: Upon learning his species had an average attention span of eight seconds, the troubled goldfish returned to his troubling of goldfish, only to forget what he was troubled about.