What is the Hadeda Ibis when the Knobbilled Duck is Pied Crow?
CREATE TABLE "table1_20042805_2" (
  "ostrich" text,
  "hamerkop" text,
  "hadeda_ibis" text,
  "african_spoonbill" text,
  "whitefaced_duck" text,
  "knobbilled_duck" text
);
SELECT "hadeda_ibis" FROM "table1_20042805_2" WHERE "knobbilled_duck"='Pied Crow';