Eurasian Tree Sparrows - (Adult & two newly fledged) - St. Louis' favorite invasive species - I'm not a fan of feeder photos. I'm not a fan of invasive species. Eurasians were imported into the St. Louis area and have taken hold. It is similar to the House Sparrow, also an imported invasive species. I do NOT sell photos of animal invasives. This is here purely for identification purposes.