CLEAN: New Zealand oiled birds get life-saving bath

The video discusses the severe impact of oil spills on shearwaters and other bird species, highlighting the high mortality rate and the challenges in recovering affected birds. It details the cleaning process, which involves removing oil to restore the birds' waterproofing. The video also addresses the difficulties in quantifying the full impact of oil spills on offshore birds and the role of human intervention in the recovery process, emphasizing the stress and complexity involved in wildlife rescue efforts.

What does the text suggest about the impact of oil on different species of birds?

How does the text characterize the job of cleaning the birds?