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BTO

@_bto

The British Trust for Ornithology (BTO) is the UK's leading charity working with volunteers to improve our knowledge of birds through monitoring and research.

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linkhttp://www.bto.org calendar_today14-04-2009 10:22:17

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With practice, and close views, adult Kingfishers can be sexed on the basis of bill colour. Adult males have at least 2/3 of their lower bill black, while in adult females at least 2/3 of the lower bill is orange. Can you sex this bird BBC Springwatch? #Winterwatch

With practice, and close views, adult Kingfishers can be sexed on the basis of bill colour. Adult males have at least 2/3 of their lower bill black, while in adult females at least 2/3 of the lower bill is orange. Can you sex this bird <a href="/BBCSpringwatch/">BBC Springwatch</a>? #Winterwatch