How many birds die from oil?

I copy this from other people: The term animals can be applied to a number of life forms from krill to Blue Whaltes. Specific animal related death rates are occasionally developed for rare, endangered or "cute" critters, usually after an oil spill. The general animal deaths number has never been calculated

To calculate the number it would be necessary to determine:

• Number of animals of the species alive at any given time.

• Percentage attributable to pollution.

• This is far more than a life's work. Additionally, the data would be changing as fast as you could collect it. And this is precisely the problem with assesssment of the pollution of our oceans. Pollution is massive (consider the North Pacific Gyre), and there isn't a good way to "get a handle on it" in an attempt to affect changes. The problem is just "out there" and bringing it home takes massive effort.

In the specific case of oil spills it would also be necessary to know the number and location oil spills each year. Many jurisdictions do not require reporting, many spills are never identified and many purposeful discharges occur. This data would be as difficult to assemle as the number of animal death.