https://www.allaboutbirds.org/guide/Tree_Swallow
https://ebird.org/view/checklist/S49880928
https://ebird.org/view/checklist/S51825802
https://www.allaboutbirds.org/guide/Tree_Swallow
https://ebird.org/view/checklist/S49880928
https://ebird.org/view/checklist/S51825802