smittyone@cox.net Posted May 11, 2020 Share Posted May 11, 2020 Seen last week at DeSoto NWR near Missouri Valley, IA. I presume to the two birds on the ground are immature Tree Swallows. I also assume the arriving bird is an adult Tree Swallow. But is it a male or female adult? In the last pic, it's the bird on the right (looking at the viewer). Quote Link to comment Share on other sites More sharing options...
akandula Posted May 11, 2020 Share Posted May 11, 2020 These are all definitely females. If there is any brown on the head or back in spring/summer, the bird is a female. There's plenty of brown on the sitting birds, so I'd call them SY female Tree Swallows. The flying bird might be an SY or an ASY bird, I'm not sure. 1 Quote Link to comment Share on other sites More sharing options...
Jefferson Shank Posted May 11, 2020 Share Posted May 11, 2020 These are all definitely females. If there is any brown on the head or back in spring/summer, the bird is a female. There's plenty of brown on the sitting birds, so I'd call them SY female Tree Swallows. The flying bird might be an SY or an ASY bird, I'm not sure. agreed Nice pictures!! Quote Link to comment Share on other sites More sharing options...
smittyone@cox.net Posted May 12, 2020 Author Share Posted May 12, 2020 Thank you. What does SY and ASY mean? Quote Link to comment Share on other sites More sharing options...
akiley Posted May 12, 2020 Share Posted May 12, 2020 1 minute ago, smittyone@cox.net said: Thank you. What does SY and ASY mean? Second year and after second year. 1 Quote Link to comment Share on other sites More sharing options...
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