Thistles are a finch's favorite plant. They feed their young on the immature fruit and the "floss" they produce. This floss comes from the flowers that have gone to seed and left their fluffy seed heads behind. Finches often select thistles' floss for structural and lining materials for their nests. Many times the thistles will mature before the finches nest, thus providing them with fresh new floss. Some thistle heads never open completely, which traps last year's floss, making the product readily available for an energetic finch. An imported thistle "niger" seed, from Africa and Asia, is high in protein and fat. It has an added bonus value of not attracting squirrels or blackbirds.
BirdLodges.com Pop-Up Finch Thistle Feeder
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