Tree and Bird ID

We did some tree and bird ID. From our photos we identified an oak tree (which wasn't out in leaf yet so we had to take photos of the buds) and Common Alder - which none of us knew before. Finn was adamant it wasn't a hazel and when we got home and compared the images we discovered that it wasn't - it was a Common Alder! Our sound recording weren't amazing because it was raining (the sound of rain itself and rain on an umbrella drowned out the sound of birds on a lot of our recordings) and we were standing close to a stream for a lot of the walk but we did manage to identified some of the birds we couldn't see but could hear as a blackbird a robin and lots of chiff chaff sounds!