Springwatch - Season 19 Episode 4 -

Week one of Springwatch wraps up with a deluge of drama. The nests are proving as exciting as ever, and Chris Packham and Michaela Strachan provide all the highlights ahead of the weekend.Iolo Williams sets himself a challenge as he sets sail into Poole Harbour, keen to see a white-tailed eagle or an osprey during the programme. Both enigmatic birds are recent additions to this part of the UK, so a sighting would be a memorable moment.Gillian Burke travels further north within Snowdonia to meet a pine marten soon to be released into the wild.