Road Kill
A recent survey found an unusual concentration of 200 dead crows near junction 28 on the M1, close to Alfreton, and there was concern that they may have died of the avian flu virus.
A bird pathologist examined the remains of the all the crows on behalf of the RSPB and was able to confirm, to everyone's relief, that the problem was definitely not avian flu.
However, he was able to ascertain that 98% of the crows had been killed by impact with trucks, and only 2% because of collision with cars.
The RSPB then hired an Ornithological Behaviourist to determine the reason for the disproportionate percentage of the truck versus car kills.
After a 6 week study the Ornathological Behaviourist was able to submit his findings in a report to the RSPB.
In summary, when crows eat road-kill, he stated, they always set up another crow as a look-out in a nearby tree whose job is to warn of impending danger from approaching traffic.
His conclusion was that the look-out crow could say "Cah" but had not learned to say "Truck".