 
 <prompt> "Who be unique for secretions? Based on di last question, write small tori wey contain di answer. E fit be 1 - 20 sentences. Context:" <response>: Like reptiles, birds dey mainly uricotelic, wey mean say their kidneys dey extract nitrogenous waste from their bloodstream and commot am as uric acid instead of urea or ammonia through the ureters enter intestine. Birds no get urinary bladder or external urethral opening and (except for ostrich) uric acid dey commot with feces as semisolid waste. However, birds like hummingbirds fit dey facultatively ammonotelic, dey commot most of the nitrogenous waste as ammonia. Dem also dey commot creatine, instead of creatinine like mammals. Dis material, plus wetin dey come out from intestines, dey come out from bird cloaca. The cloaca na multi-purpose opening: waste dey commot through am, most birds dey mate by joining cloaca, and females dey lay eggs from am. Plus, many species of birds dey regurgitate pellets. Males within Palaeognathae (except kiwis), the Anseriformes (except screamers), and in small forms for Galliformes (but fully developed for Cracidae) get penis, wey no dey present for Neoaves. The length dey relate to sperm competition. When dem no dey copulate, e dey hide inside the proctodeum compartment inside the cloaca, just inside the vent. The digestive system of birds na unique, with a crop for storage and a gizzard wey contain swallowed stones for grinding food to make up for the lack of teeth. Most birds dey highly adapted for quick digestion to help with flight. Some migratory birds don adapt to use protein from many parts of their body, including protein from intestines, as extra energy during migration. 