There are incidental records of retrapping European Storm-Petrels with leg abnormalities after a year, suggesting their apparent survival (Scott 1970).
We carried out the study in a large breeding colony of European Storm-Petrels on Nolsoy Island (61[degrees] 59' N, 06[degrees] 47' W) on the Faroe Islands.
The proportion of European Storm-Petrels with leg abnormalities recorded in our study (2.
Alternatively, European Storm-Petrels could have a very strong general immunological system.
The present study documented a very low frequency of leg abnormalities in the population of the European Storm-Petrels on the Faroe Islands, and no effect of leg abnormalities on a bird's health status.