speckled birds, n. — Green’s Dictionary of Slang

speckled birds n.

[? packaging + they make one fly v. (3)]

(US drugs) amphetamines.

1977		L. Young et al. Recreational Drugs.
1979		D. Gram Foxes (1980) 40: Sweet things. Like coke, and ’ludes, and reds, and Christmas trees and speckled birds.
1981		D.E. Miller Bk of Jargon 338: speckled birds: Amphetamines.