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Like Desert Island Discs, where you can hear castaways like Cher, Gareth Southgate and Nick Cave,

and enjoy longer versions of the music they've picked.

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Listen to your favourite podcasts first on BBC Sounds.

The Scotland Outdoors podcast from BBC Radio Scotland.

Hello and thanks very much for downloading this podcast.

I'm Mark Stephen.

Colin Pryor is one of Scotland's

most wheel-kent landscape photographers. If you've seen a photograph of Scotland, chances are

it's one of his. He's an extraordinary talent. It's his interest and his passion for the natural world,

however, which has taken him all of the world to photograph wild places.

In his latest project, Fragile, he turns his attention to Bird's Eggs,

specifically the collection of birds' eggs at the National Museums of Scotland.

The resulting book is beautiful, and I have to say strangely mesmeric.

I went along to the Collection Centre at the National Museums in Edinburgh

to meet Colin and also Bob McGowan,

the senior curator, who helped him pull the whole thing off.

I began with Bob, who just explains a bit here

about the collection.

The tray in front of you is a display case

of blackbird clutches which shows an incredible range

...