Question: Which Species has a Medium Threat Level?
SQL: SELECT "Species" FROM "2-1107553-1" WHERE "Threat level" = 'Medium';

Question: What is the Overview with a Medium Threat Level?
SQL: SELECT "Overview" FROM "2-1107553-1" WHERE "Threat level" = 'Medium';

Question: What is the Threat Levels with Rabbits in Australia?
SQL: SELECT "Threat level" FROM "2-1107553-1" WHERE "Overview" = 'Rabbits in Australia';