Just across from our house a group of Rooks (Corvus frugilegus) have built nests in the upperworks of a Scots Pine tree. We've watched these fascinating and characterful birds in flocks through the winter, then as they re-established their pair bonds - one particular pair use a tree in our garden to display to each other; they are an obvious pair and it's possible to distinguish male and female by appearance as well as behaviour.
The birds usually nest in early February but were held back by the series of violent storms which crossed the UK. Things are well underway now though, and today we thought that we heard the first higher pitched "caah" of a tiny young Rook...new life emerging.
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