I thought it may be of some interest that 2 of "my" (well the next door neighbour's) House Martins have returned today around half an hour before sunset to roost in their nests. Yippee - they are wonderful aren't they! Hopefully a few more will come very soon. This is coastal western Algarve, Portugal. Temperatures are between 10ºC and 17ºC at the moment. its usually a little cooler and we are in our coldest month of the year, with Feb and the first half of March not so different. Since I've been at this location, during the last 4 years, they have always returned close to end of January. My neighbours says, that around 10 years ago they always came back around the 7th February.