这些不需要鸡蛋染料(No egg dye needed for these)

美国知更鸟不会刻意隐藏自己的彩蛋，也不需要用水彩来庆祝复活节！多亏了母亲血液中的一个过程，她的卵子——她每年可以产卵三次——总是被涂成这种可爱的蓝色。这种自然色调甚至有个名字叫“罗宾蛋蓝”
原文：
The American robin doesn't go out of its way to hide its coloured eggs, nor does it need watercolour to celebrate Easter! Thanks to a process in the mother's blood, her eggs – which she can lay up to three times each year – are always coloured this lovely shade of blue. There’s even a name for this natural hue, 'robin's egg blue.'
《© Mira/Alamy》