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ZEISS DTI thermal imaging cameras. For more discoveries at night, and during the day.

Fewer wild swans returning to UK in winter (3 Viewers)

Sad in many ways, not least that the change is due to climate change. The Bewick's Swan study is an example of the importance of long-term monitoring programmes.
Such a shame that WWT decided only 2-3 years ago to cease many of their long-term single-species studies in favour of other projects.
SW
 

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