Tom's Bird Feeders Sibley's Red-Tailed Hawk Adult t-Shirt Size Medium Featuring the artwork of celebrated ornithologist, author, and illustrator David Allen Sibley this 100% preshrunk cotton natural (not white) t-shirt beautifully illustrates the Red-tailed Hawk in full flight. The juvenile plumage and several adult plumages are depicted Graphics printed with water-based ink As an added surprise, silhouettes of Redtails in several forms of flight are illustrated on the back of the shirt.