Why American robin eggs are blue

This video from the USA says about itself:

2 Reasons Why Robin Eggs Are Blue (American Robin)

8 July 2018

Have you ever seen a Robin egg before and wondered why it’s so blue? Turns out there are two reasons why this is the case.

2 thoughts on “Why American robin eggs are blue

  1. Pingback: Cowbirds, cuckoos and changeling stories | Dear Kitty. Some blog

  2. Pingback: American robins video | Dear Kitty. Some blog

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