if you ever thought crows were annoying, this might change your mind

There are a pair of crows whose territory includes the intersection of 6th Ave. and Moberly in Vancouver. A rail line crosses Moberly and parallels 6th for several blocks. Used only by the Downtown Historic Railway, the traffic on the line consists of two heritage streetcars which run a half-hourly schedule on Saturdays, Sundays and holidays from noon 'till 5:00pm. These crows have figured out that if a mussel is correctly placed on the rail head, the train will run it over, conveniently removing the shell and providing a tasty snack for the crows. Proably due to the east-west orientation of the rail line, they prefer westbound trains. The crows' timing is so precise that bystanders have reported the train running over a crow. Due to reconstruction of the rail line, the historic trains have not run for two years, but in the interum two modern low-floor streetcars were introduced during the 90 days of the 2010 Winter Olympics. These trains ran at 15 minute intervals and looked very different from the historic equipment. The crows watched for some time, but eventually figured out that the modern streetcars would perform the same function as the old ones. They began placing various food items on the rails, with two differences: they now used both rails with the trains going in either direction, and they watched from the gravel beside the rails, staying on the ground as the trains passed.
It will be interesting to watch how theyu adapt if the historic trains are placed back in service, possibly at the end of July.