[MarMema]

The survival rate will differ with each oil spill because of all the factors that effect it. Some of those factors are the toxicity of the oil, how rapidly the birds are collected and stabilized, what condition the bird was in before it was oiled, and the species involved. We have had release rates as high as 100% and as low as 25% in the early years. We now average about 50% to 80%. Again, it depends on many variables and cannot be predicted.

[The KG9 Kid]

I don’t know who races out to find animal victims of these man-made disasters, but anyone who wants to scrub the oil off a pelican or an otter is A-OK in my book.

[XHogPilot]

You need to read further down into the article you linked:

How many of them live after they are released? We don't know.