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A pack of 50 blank K rings to practice closing
3 mm inside diameter
30 contributors—from young birdwatchers to professional ornithologists—explain why and how they are shifting to climate-friendlier approaches
From first encounters with hawfinches to focusing in on birdsong
D2 Rings Field Guides A pack of 50 blank** Please use the drop down menu above to select the quantity of rings that you require** 5. 25 mm inside diameter Incoloy (hard) metal rings. This product will only be sold and shipped to appropriately licensed BTO ringing permit holders. C permit holders: please ask for the rings to be issued in your Trainer's name or Ringing Group name and not your own. Please ask your Trainer to email sales@bto. org in order to authorise the order.
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US$ 49.00
