Kallima knyvetti, the scarce blue oakleaf,[1] is a species of leaf mimic butterfly found in Southeast Asia.

Male upperside forewing: basal area to near apex of cell and thence obliquely to the zigzag subterminal line as it crosses interspace 1 dark green, succeeded by a black line along the discocellulars, and a broad sinuous discal band (not curved as in Kallima horsfieldii) bluish white below vein 3, pure white with bluish suffused inner margin above vein 3 to costa; measured on the costal margin, the outer edge of this band less than half the length of the wing from base, the rest of the wing to apex black, with a preapical white spot; a medial discal hyaline (glass-like) spot in interspace 2.

Hindwing: dark ochraceous brown, the costal margin and apex broadly and the abdominal fold much paler brown, irrorated (sprinkled) with scattered dusky scales; vein 1 and the abdominal fold with long soft brown, hairs.

Underside as in Kallima inachus protectively coloured.

Sikkim; Bhutan: Assam, the Naga Hills; Tenasserim.