Felled my first tree's by hand, using a bow-saw and hatchet. Have only taken saplings so far so this was a step-up; you don't really appreciate how much weight and force there is in a tree — even a relatively small tree like birch — until you're working with them this way.
The first came down easily but the second got trapped up in the bows of the pine, so we had to lead it down from a distance using rope. Otherwise it was a fairly quick process.
We're removing these birches to free up space for the crowded pine; its lower canopy has already started to die back and we want to minimise the risk of it getting any more out-shaded. We're also planning to have a growing space adjacent, and the roots of these will take up a lot of useful water and nutrients from the soil. Birch is a very hungry tree!