On Tuesday 16th February 2010 a decapitated sea gull was found next to our sound level meter by the Proven wind turbine. This is the second dead bird in 2.5 years of monitoring the turbines. Oh well, it was only a gull
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Bird strike with wind turbines has been the subject of some study in Scotland (by Scottish Natural Heritage and other environmental groups), where they are at pains to site windfarms in places that will not interfere with the paths of migrating geese. In case you'd like to predict the number of gulls you're going to decapitate, the most popular model is currently the 'Band' Collision Risk Model (Band et al 2006), although without some empirical data for existing installations, you'd need to assume an avoidance factor (the number of birds that detect the turbine and avoid it).
Interestingly, some eagles have been observed to deliberately 'play roulette' with the rotating blades. Perhaps you have some gulls that have simply 'had enough' of city life.
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