When defending their territory, against which threats are Eastern Kingbirds famously bold?

Answer

Much larger predators, including hawks, crows, and owls

Kingbirds are renowned for their aggressive defense strategies and will engage in loud aerial harassment against much larger perceived threats near their nest site.

When defending their territory, against which threats are Eastern Kingbirds famously bold?

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How Can I Attract Eastern Kingbirds? - Bird Watching Diaries

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