| The jackdaw is a resident in Barcelona throughout the year. Its plumage is dark grey except for lighter grey nape and neck-side. As with most corvids, the jackdaw is an opportunist. It feeds on all types of land invertebrates (insects, snails, worms, etc.), the eggs of other birds, small mammals and reptiles, and berries and seeds.
Almost never seen alone, it usually flies in pairs or small groups. This is a monogamous and colonial bird. Both the male and the female build the nest, located in holes in buildings using twigs and other dry plant material.
Jackdaw populations have fallen in parts of Europe, and specifically in Catalonia it is one of the species of birds to have declined most in the last 20 years, having disappeared from almost half its old territory. Despite this, a significant population still exists in Barcelona, where it nests primarily in old churches. The Church of Santa Maria del Mar has a population of several dozen jackdaws which fly to the nearby zoo to feed.
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