North Notts RG recently captured a sample of Fieldfare and Blackbird in an Orchard where birds were concentrated to feeding on apples.
Over 400 were caught, mainly using a whoosh net.
Biometrics and fat scores were taken on 95% of birds caught and over 100 recaptures provided a good sample to look at weight changes.
Most birds were in good condition between 100-120g, some in excess of 130g and fat scores of 1-3. Less than 5% had weights less than 90g.
A large proporton of the Fieldfare were adults. Had the immature birds moved elsewhere or perished in the cold weather? It would be interesting to know the condition and age ratios of Fieldfare and Blackbird caught by others in different parts of the country during these cold conditions.