Crows

Recently biologists have noted that more crows have been getting killed by vehicles on major trucking highways than on normal roads. After tire print and impact analysis, they determined that these crows are being killed by large trucks, not cars. One especially bright scientist came up with a hypothesis. These crows always post a sentry while they eat roadkill to warn them of any approaching traffic. The problem lies neither in the sentry nor the larger body of crows, but in miscommunication. The crows have learned to say "Car! Car!" but they have not learned how to say "Truck! Truck!"

Best told in UK or by someone with English accent.

Edit: A Boston accent would also work well. My thanks to u/Stunpun