(FOUR-LETTER CODES ARE “ALPHA” CODES USED BY BIRDERS/ORNITHOLOGISTS FOR BREVITY’S SAKE). NOTE THAT DURING NON-BREEDING SEASON, MANY OF THE MOST VISIBLE CHARACTERISTICS THAT DIFFERENTIATE MALE BIRDS OF SIMILAR SIZE/SHAPE CAN BE MUTED OR ABSENT. Click or tap on all photos to enlarge! House Sparrow (HOSP) Length: 5.5″ to 6.5″ Weight: 1.4 oz House Finch (HOFI) […]