Clean out your nestboxes if you haven't yet. The bulk of our breeding songbirds has not quite started yet (many aren't even back from their wintering grounds). However, some early breeders, such as Eastern Bluebirds, can be on eggs already.
Most migrant species don't waste much time and will immediately start scoping out suitable nest locations and staking out territiories once they get here, so be prepared!
Photo copyright Twan Leenders