I've lived near the Water of Leith for over 20 years ... but it took a chance encounter in December to spot an otter on the river for the first time. Since then I've become captivated by these beautiful animals.

I'm joining Ross, otter-spotting maestro, to walk as much as possible of Edinburgh's otter habitats for 24 hours. As well as looking for otters, we'll be talking to people about IOSF and the fantastic work they do.

IOSF is a leading otter charity, based in Scotland and spearheading work both in the UK and overseas. I want to raise some funds to 'give something back' for all the pleasure that otter-watching has given me in the past six months.