It was not a sparrow after all, but some similar bird.
It is likely that 'penguin' was at one time the name of similar, now extinct bird which had a white patch near its bill.
It is the kind counterpart to the very similar birds.
This large family is often further subdivided into groups of similar birds.
Observations of similar birds were made in 1995 at another site.
Its voice is unknown but similar birds make churring and whistling sounds.
They are described as very beautiful birds similar to a peacock, have three legs, and live in the sun.
The boss at the end of the level is a bi-pedal bird similar to an ostrich.
Rincewind became aware that there were lots of similar birds around.
For his guide, he placed similar birds together and used arrows to note recognizable "field marks."