ground roller

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ground roller:

see rollerroller,
common name for brightly colored Old World birds noted for performing somersaults in flight. They include the rollers proper (subfamily Coraciinae) and ground rollers (subfamily Brachypteraciinae; sometimes considered a separate family, Brachypteraciidae) of the family
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The best time to visit the forest is at dawn or before dusk when some highly localised and rare birds are most active including the long-tailed ground roller, found only in a narrow coastal strip of southwestern Madagascar, the subdesert mesite, Archbold's newtonia, the banded kestrel and the rare running coua.