bluejay
noun [ C ] uk/ˈbluː.dʒeɪ/ us/ˈbluː.dʒeɪ/
冠蓝鸦，蓝背樫鸟（北美小鸟，蓝背灰胸，有羽冠）
a small North American bird with a bright blue back, a grey front, and feathers that stand up on the top of its head
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