The Highways Agency found over 200 dead crows on the M4 near Bridgend
recently, and there was concern that they may have died from Avian Flu. A
Pathologist examined the remains of all the crows, and, to everyone's
relief, confirmed the problem was NOT Avian Flu. The cause of death appeared
to be from vehicular impacts. However, during analysis it was noted that
varying colours of paints appeared on the ...bird's beaks and claws. By
analysing these paint residues it was found that 98% of the crows had been
killed by impact with lorrys, while only 2% were killed by cars.
The Agency then hired an Ornithological Behaviourist to determine if there
was a cause for the disproportionate percentages of truck kills versus car
kills. The Ornithological Behaviourist quickly concluded that when crows eat
road kill, they always have a look-out crow to warn of danger. They
discovered that while all the lookout crows could shout "Cah", not a single
one could shout "Lorry"
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