More Mysterious Bird Deaths. What is the connection?

http://www.csmonitor.com/World/Europe/2011/0105/First-blackbirds-in-Arkansas.-Now-jackdaws-drop-in-Sweden.-A-common-cause

First blackbirds in Arkansas. Now jackdaws drop in Sweden. A common cause?

Falköping, Sweden, joins Pointe Coupee Parish, La., and Beebe, Ark., as the latest sites where experts are scratching their heads over mass bird deaths.

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Rescue chief Christer Olofsson held a dead bird in Falkoping Sweden Wednesday Jan. 5. Officials say about 50 birds have been found dead on a street in Falkoping, Sweden. Veterinarian Robert ter Horst says the cause of the jackdaws' deaths was unclear, but that fireworks were set off near the scene Tuesday night.

Bjorn Larsson Rosvall/AP