Monday, 18 July 2016
Anting is thought to aid in cleaning or disinfecting the bird's plumage. The bird would be using the ants as tools, as ant's secretions, including formic acid have known bactericidal, insecticidal and fungicidal properties. The ants would behave agressively and defensively if they are picked up or rubbed by the bird or if the bird is disturbing their nest.
Blackbirds, other thrushes, starlings and corvids use anting. Some of the species sit on wood ants nests, or even apply individual ants on their plumage. Some bird species use a similar behaviour with millipedes, which also produce strong chemical secretions.
I think it is unlikely anting is a learned behaviour, as it is quite rare. I wonder if the ant's frenzied activity around nests today - it was flying ant day in Hull - stimulated the Blackbird to engage in anting behaviour.
See this post at my other blog on birds and flying ant day