2021 Purple Martin Season By Tor | March 31, 2021 - 8:32 am |March 31, 2021 Wildlife & Outdoors Comments Off on 2021 Purple Martin Season 2021 Purple Martin season is in full swing. Lots of activity. First Martin showed up on 3/22, which is a bit later than last year. We still have more to arrive, as we usually have 71-72 pair, with around 290-300 fledglings every year. Taken this morning.