Budgies possess a single hole where the rests of the digested
foodstuff and the urine come out: the so called
vent or cloaca. It is also this part of their body
that is highly important in reproduction. Male budgies emit their sperm
through the cloaca, female ones receive it through theirs, and later they
lay their eggs through the vent. The crissum is
the area around the cloacal opening. One can find it in front of the
undertail coverts.
Link tip: Do you want to discuss with experts and other bird owners about your bird's health? Then please feel free to visit the English forum 
of 
. Of course you will meet me there, too. My nickname is "Feenseeschwalbe".
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