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

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    Identify a Nightbird ?

    How do I identify a nightbird? If it were daylight, I would walk toward the sound until I saw the bird. That won't work in the dark. We have one here in the fir forest at 1000 ft altitude in the southern end of the Willamette valley, I would like to identify. It says pop - pop- pop...
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    Owls Seeing Color?

    Do Owls see approximately the same amount of color as us? I have read that an owl's retina has some cone cells but fewer than ours. On the other hand, their eye captures more light than ours to stimulate these cells. Has a study been done to in some way determine how much color intensity, or...
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    Have the Goldfinches Returned?

    I live in the upper Willamette valley. It seems late for the American Goldfinch not to have shown up yet. Am I remembering the dates wrongly? We had two yellowish birds here two or three weeks ago that I took to be female Goldfinches, but they may have been Pine Siskins; but if they were female...
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    Design a Bird's Eye Camera Lens

    10 or 15 years ago, I saw a television show that said a duck has oil cells in it's eyes that allow Mr Duck to see gradations of color hue we do not see. We were shown a hunter in a duck blind through a normal camera lens. He was well hid. We were then shown the same scene through a lens that...
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    Cornell Link Updated

    A few years ago someone posted a link to a comparison table of spotting scopes reviewed by the Cornell University Ornithology Department. That link is no longer valid. This one works: http://www.birds.cornell.edu/AllAboutBirds/gear/scopes/compare Here is the comparison the table comes from...
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    Why do Piliated Woodpeckers always call while flying?

    This bird is locally common where I live in western Oregon. I have been here forty years and I have never seen one in flight that was not squaking it's head off. Now geese do this, but they are in a flock talking to each other. Piliated Woodpeckers are always singles. Who are they...
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    Octarem Adjustments

    Hi everybody. I am 46 yrs old and have looked thru binoculars since I was a boy, but my newest pair have something I have never seen before. They are Zeiss 8x50 model Octarem. The serial number says they were made in 1985. They are a center focus design with the right eyepiece being the...
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