1 February 2011
I have been working for the RSPB as a wildlife adviser since spring 2004. I have always had an interest in wildlife and this prompted me to do a degree in Ecology. As well as birds, I am particularly interested in invertebrates, reptiles and amphibians.
Sent in by Phil Greenwood, Birstall, West Yorkshire
Technically, the most common bird in the world is the domestic chicken, with around 50 billion birds. However, the most common wild bird is thought to be the red-billed quelea. They are sparrow-sized birds with brown bodies and the males have a red bill with variable face markings.
This species is found in sub-Saharan Africa. They are members of the weaver family and there are thought to be about 1.5 billion breeding birds. They are very social and some flocks can be in the millions. They feed on seed and, because of their numbers, can damage crops.
The most common bird in the UK is the wren. There are thought to be around 8.5 million breeding territories in the UK. This may surprise some people because they are not as regularly seen as woodpigeons or house sparrows, for example.
However, wrens are very widespread throughout the UK and inhabit a wide range of habitats. They like to stay close to cover so don't often come onto feeders but can easily be heard as they have a very loud song for a small bird.
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