The two "gut" keys for me are (1) Size: Tigers big, Blacks small. The largest Blacks will be only as large as the smallest Tigers. (2) Yellow spots. Blacks have double rows of yellow spots on the forewing, double rows of yellow spots on the body, yellow spots on the hindwing ... Exhibit A: Papilio polyxenes f If you're lucky to see the light through the wings, a third key is that female Tigers are really dark brown, not black. What's hard for me is sexing Black Swallowtails when they are ambiguous. I believe this one is male because of the solid row of yellow spots inside the blue, but he might be best called "metrosexual."

Drive up to New York. You will make a lot of money. Farmer's markets are always packed. People line up to buy and pay. You can sell at very good prices. dcarch

.............DOWN...............

Rondo, based on the results of the quiz, the fish you're closest to is a Bluefin Tuna! Often referred to as the Porsche of the sea, you can reach speeds of over 50mph, whilst swimming just beneath the waterÂs surface. You are warm-blooded, which is rare among fish, and have incredible migratory ability. You can be found in a large range of habitats -- occupying the cold waters around Newfoundland and Iceland to the warm waters of the tropics. You can grow to 14ft in length, weigh up to 1500 pounds, and live up to 30 years, whilst enjoying a diet of small fish, squid and crustaceans. Unfortunately, you are also under critical threat from overfishing. As a popular seafood, you can be found in restaurants around the world - especially in sushi dishes - and you are a highly prized sports fish. But as demand exceeds supply, your population levels are endangered. This is reflected in your price as you are considered one of the worldÂs most valuable fish - a fellow bluefin sold for $172,400 at a Tokyo fish market.