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I've had mixed results with "thistle" seed - some batches get eaten fairly quickly, while others just sit in the feeder until I dump them. I suspect it's a matter of how long they sit in storage before getting sold. Goldfinches prefer it, but I've also had Purple Finches and Juncos on the feeder fairly regularly. House Sparrows, perhaps ...


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In the Olde Dayes of big, bulky, traditional Porro prism binoculars, the rule of thumb for birding binoculars was that you needed an exit lens:power ratio of about 5 for best results. The power is the 7X or 8X or 12X number (indicating how much magnification it provides) and the exit lens size is given by the other number: 35 or 40 or 50 or whatever. Higher ...


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