"Columba livia. Male urino-genital organs. adr, adrenal; cl. 2, urodaeum; cl. 3, proctodaeum; k, kidney; ts, tetis, that of the right side displaced; ur, ureter; ur', aperture of ureter; vd, vas deferens; vd', its cloacal aperture; v. s, vesicula seminalis." -Parker, 1900

Male Rock Pigeon Genitalia

"Columba livia. Male urino-genital organs. adr, adrenal; cl. 2, urodaeum; cl. 3, proctodaeum; k, kidney;…