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

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  1. T

    Bluetit - Him or Her?

    Hopefully, if they nest again it might be possible. 🤞 From memory I think age may also be a factor in cap colour.
  2. T

    Bluetit - Him or Her?

    Experience, as litle as it is, has shown me that judging the depth of colour when looking at a single bird is extremely difficult. Even when two are seen in daylight it's still not so easy, so in nest box light I know it can only be a guess. Taking this and other images together, on balance, I'd...
  3. T

    Bluetit - Him or Her?

    When I said "depth of blue cap" I assumed it would be taken as meaning the intensity of the blue colour. Males being a darker blue.
  4. T

    Bluetit - Him or Her?

    Hi folks, sorry it's been a while a since I last visited. Again on the subject of our "lodger". For a couple of years they haven't shown much interest but just before Christmas, and strangley enough after the very cold snap, it arrived. It's been spending each night with us since then. Now I...
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