No owls are not omnivores because they eat mice,lizards,and snakes.
5.3 Operating Expenditures for Offshore Wind There has been no indication that expected operating expenditures for offshore wind projects have shifted between 2010 and 2013. The OpEx baseline for 2013 was assumed to be $40/MWh, equivalent to $136/kW/yr, with a range extending from $20/MWh to $70/MWh.
The following tables shows the costs per kilowatt-hour for wind turbines with capacity factors of 23%, 25%, 27% and 30% with capital costs per kilowatt of rated capacity of $1,000. These tables are also based on spreading the costs over 12 and 20 years and a capital return of the percentages listed.