springtime 2019

ive no idea what's going on, ive only one pr of bluetits here, then i spot a male interested in my other log box near the house, he stayed inside for sometime and looked out as if he was expecting to coax his partner in. i hadn't had any interest that im aware for several months, that must of been Martin, i don't understand especially as the nest is nearly ready at the other end of the garden.
ill continue to look out or was it a one off visit?