Table: wildlife_reunion
Columns: species
order
family
species_worldwide
species_on_r_union

Question: Which species on Réunion island is part of the procellariiformes order and is part of the hydrobatidae family and has less than 21 species worldwide?
SQL: SELECT SUM("species_on_r_union") FROM wildlife_reunion WHERE "order" = 'procellariiformes' AND "family" = 'hydrobatidae' AND "species_worldwide" < 21

Question: How many species does the sternidae family have worldwide with less than 9 species on Réunion?
SQL: SELECT COUNT("species_worldwide") FROM wildlife_reunion WHERE "family" = 'sternidae' AND "species_on_r_union" < 9

Question: How many species on Réunion do the dromadidae family have with a worldwide speices larger than 1?
SQL: SELECT SUM("species_on_r_union") FROM wildlife_reunion WHERE "family" = 'dromadidae' AND "species_worldwide" > 1