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

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  1. njlarsen

    Time calibration and Linnean ranks in birds

    except that it only applies to 25% of the species ... Niels
  2. njlarsen

    Time calibration and Linnean ranks in birds

    Definition of Tundra can be found on the page linked to below. An excerpt: https://earthobservatory.nasa.gov/biome/biotundra.php And the juvenile has yellowish spots even if these quickly fade to whitish :cool: Niels
  3. njlarsen

    Time calibration and Linnean ranks in birds

    European GP is breeding in the UK and Denmark it seems, not exactly places I would consider Tundra ... https://science.ebird.org/en/status-and-trends/species/eugplo/abundance-map?season=breeding
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