What is the primary food source for goldfinches, sometimes still called thistle seed?
Answer
Nyjer seed
Nyjer seed, which is often referred to by its older common name, thistle seed, is established as the primary food source for American Goldfinches, particularly during the winter months. This tiny, black oil seed is highly valued by the birds because it contains a high oil content, which supplies the necessary energy reserves they require for survival, especially when resources are scarce or temperatures are low. While sunflower hearts are also highly effective attractants, Nyjer remains the quintessential seed associated with this species.
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