According to researchers, the birds dietary changes maybe a strategy to cope with stresses of migration. Birds are able to distinguish between the healthiest of berries that will enable their bodies to stock up antioxidants and nutrients. Thus, they are able to maintain a healthy immune system throughout the migratory period. Birds also help to disperse seeds and are an integral part in the ecology!
(Photo Credit: http://www.freedigitalphotos.net)
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