Somewhat, the birds choose soil that have greater amounts of sodium. At one clay lick web-site, on a specific bend from the Manu River, scientists noticed parrots ingesting 1 distinct layer of soil which runs hundreds of meters horizontally along that bend. The parrots averted feeding on the layers https://judahmmnnm.getblogs.net/58854135/the-basic-principles-of-macaw-clay-lick-bird