CREATE TABLE table_23495 ("Ostrich" TEXT, "Hamerkop" TEXT, "Hadeda Ibis" TEXT, "African Spoonbill" TEXT, "Whitefaced Duck" TEXT, "Knobbilled Duck" TEXT)

What is the Hadeda Ibis when the Knobbilled Duck is Pied Crow?
SELECT "Hadeda Ibis" FROM table_23495 WHERE "Knobbilled Duck" = 'Pied Crow'
SELECT "Hadeda Ibis" FROM "table_23495" WHERE "Knobbilled Duck" = 'Pied Crow'