On the board - Maybe
This afternoon I had 4-5 Martins flying around my setup. Two of them stayed for the remainder of the afternoon into the night. I watched them up until just before it was pitch dark. The Purple colored one was in the gourd for 5 minutes at a shot and then he sat on the gourd porch for a few hours after this he flew off just before it was totally dark. The other one sat on the porch of one of the gourds for an hour or two and it was still there just before dark. See what happens tomorrow! This is my 4th year trying.