High frequency of albinism and tumours in free-living birds around Chernobyl

- Frequency of albinism and tumours in 1669 birds from Chernobyl.
- 111 cases of partial albinism and 25 cases of tumours were predicted by radiation.
- Abundance of birds was reduced relative to frequency of albinism and tumours.
- Albinism and tumours are biomarkers of radiation exposure.