How many species on Réunion do the dromadidae family have with a worldwide speices larger than 1?
CREATE TABLE "birds" (
  "species" text,
  "order" text,
  "family" text,
  "species_worldwide" real,
  "species_on_r_union" real
);
SELECT SUM("species_on_r_union") FROM "birds" WHERE "family"='dromadidae' AND "species_worldwide">1;