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. Plus Springwatch 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.