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Wagtail Bird Babies Have UV Markers in Their Mouths to Aid Parents Aim in Dispensing Food

Narelle Towie writes in WAToday about the wagtail adult birds ability to see the ultraviolet markers in their babies mouths so that dispensing food is more accurate. Excerpt: Next time you’re changing a dirty nappy, just be glad you’re not a willie wagtail parent. The toughest bird on the block keeps its nest clean by…

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