From Loftin, NASA Sp 468, 1985

Typical values of airfoil maximum lift coefficient for various types of high-lift devices: (1) airfoil only, (2) plain flap, (3) split flap, (4) leading-edge slat, (5) single-slotted flap, (6) double-slotted flap, (7) double-slotted flap in combination with a leading-edge slat, (8) addition of boundary-layer suction at the top of the airfoil.

From Hertel, Fig 53 Sparrow Hawk ( Falco sparverius)

Wing in High Lift Auxiliary lift devices: 1= alula, 2 = split-wing sascade, 3 = leading edge auxiliary device (Leading-edge flap-comb) 4 = auxiliary device on upper side of wing