one word in each answer is the name of an animal, bird or reptile-some names occur more than once.
4, facial feature with drooping ends(6,9)
6, grand national winner(3,9)
7, second world war popular song (3,3,9)
8, one twentieth of one pint(5,5)
10, act the fool (4,3,5,4)
13, michgan, u.s.a (9,5)
16, rock hudson film (3,7,5)
17, town in bedfordshire(8,7)
18, he played "tonto"(3,11)
19, a corruption of asparagus(7,5)