Biomonitoring heavy metals using the barn owl (Tyto alba guttata): sources of variation especially relating to body condition.

The feasibility of using the Barn Owl (Tyto alba guttata) to monitor environmental quality in the Netherlands was investigated, using Cd, Cu, Pb, Mn, and Fe as indicators for environmental contamination. Throughout 1992, bird-watchers, volunteers, and officials submitted 53 birds. The age and geographical distribution of these birds, formed a representative sample of the population.

[The cat has not always done it. A case of alpha-chloralose poisoning in wild birds].

Neglected hens caused annoyance at a graveyard. Following veterinary advice, the authorities used alpha-chloralose-dressed feed in an attempt to sedate the animals, thus facilitating transport to a more suited place. However, the feed was also consumed by other birds.