Misc: What animal is a mare when female & a stallion when a male?

Questions

what are "flying dutchman", "soling" and "tornado" all classes of?

what hollywood actress was nicknamed "the legs"?

what country consists of some 13,000 islands stretching for almost 5,000 kilometers?

wagon, stand, aid, dance?

What was the name of the young orphaned clerk in The Iron Horse?