I watch these Rooks everyday out of my window at home. They are very busy at the moment building nests - and I often watch them carry long twigs up to the highest branches. They carefully weave the spindly sticks in and out until their nests are large and comfortable enough. I guess soon they will lay eggs and rear their young.
What birds can you see outside? Do you have any regular visitors to your garden? How many different species can you name?