A portable apparatus for separating the expended husks from bird seed mixtures after the bird has shelled the seeds and left the husks among the seeds has been designed. It includes a hopper, rectangular case divided in two parts (one for receiving seeds and other collecting un-seed materials) and air supply means. The air stream agitates the mixture and floats the husks and fine dust up wardly for collection in the husk receiver while the air exhausts through holes at the opposite side. The experiments included four cleaning air speeds (2.5, 3.0, 3.5 and 4.0 m/s), four baffle angles (35, 40, 45 and 50°), two fiberglass baffles (with or without rubber covered) and two seed samples (before and after feeding). Cleaning efficiency and seed losses were measured. Results showed that, the maximum value of cleaning efficiency (98.7 %) for seed mixture before feeding was achieved at cleaning air speed of 4.0 m/s, baffle angle of 35° and baffle without rubber. The minimum value of seed losses (0.3 %) for seed mixture after feeding was achieved at cleaning air speed of 2.5 m/s, baffle angle of 50° and baffle with rubber. It is recommended to use the cleaning device at cleaning air speed of 4.0 m/s, baffle angle of 35°, baffle without rubber to increase the cleaning efficiency and use it at cleaning air speed of 2.5 m/s, baffle angle of 50°, baffle with rubber to lessen seed losses.