Foraging techniques vary between species that coexist which reduces competition; in Namibia, Double-banded Sandgrouse feed slowly and methodically whilst Namaqua Sandgrouse feed rapidly, exploring loose soil with their beaks and flicking it away sideways.
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This happened in 1863 and 1888, and a major eruption took place in 1908 when many birds were seen as far afield as Ireland and the United Kingdom where they bred in Yorkshire and Moray.