Kraken or Calypso.
Im fairly sure now that despite DNA saying he/she is a female. That she is a he.
I found HIM chasing his sister around, doing the mating dance/poses at her. Males and females do different poses. Females bow and cluck. Males pull back their whole body and open their wings into a heart.
borrowed from the interwebz. This is the “heart pose” breeding behavior for a male IRN and the bowing pose for a female. Siren isnt bowing down, but Kraken 100% was pulling back.