From my experience the two small birds that are very loud are parrotlets and the monk birds.
I was attending a bird show one time and as I walked in I heard the loudest birds calling ever. I asked a person with birds what kind of birds were so loud. The reply was "the parrotlets of course in the back". She was correct as I walked back in this huge building to see for myself. Told myself never to get that species.
I was attending a bird show one time and as I walked in I heard the loudest birds calling ever. I asked a person with birds what kind of birds were so loud. The reply was "the parrotlets of course in the back". She was correct as I walked back in this huge building to see for myself. Told myself never to get that species.