1678 J. Ray tr. F. Willughby iii. ii. 362 Wormius his Eider or soft-feathered Duck.
1711 J. Petiver VI. Table LVIII Soft-feathered Cape Coralline.
1930 Mar. 145/2 Owls were formerly considered to be closely related to the hawks, but modern systematists are incline to place them near that other group of soft-feathered night-flyers.
2000 11 June 4/5 [The] very well-behaved Australorp cockerel was best soft-feathered large fowl and soft-feathered bird.