My dad has quite a lot of different birds at the moment. One particular breed lays very pretty eggs, some lightly freckled in creamy coffee brown, some heavily speckled in rich chocolate, some almost treacle coloured - and some purple! I expect that even without seeing the photo you'd have guessed which he saved for me. But can you guess the breed?
I'll give you a clue (not because I'm nice, just because I need something to make this fit the blog subject). The name of the bird is a synonym for flinch or tremble in fear.