You are very wise not to sell Kerryn. 'Sellers remorse' is a dreadful disease, :cry: and I have suffered badly. I sold the most beautiful Bucella Cristali rabbit. It was so delicate and beautifully made. (there is a picture in Anita's Murano Zoo if you would like to see it). Thank goodness I have a permanent record of it, and between you and me, it sold for no money!!
I now only sell pieces I have duplicates of, or pieces that are damaged, and even then I have had 'SR' symptoms, because actually with hand made art glass, there is no such thing as duplicates.....each one is a 'one-off'.
Your birds are beautiful, and both are, I am certain, very valuable. More importantly, you love them, the best reason for collecting. I love Murano glass, and have a small but bery beautiful collection of birds and ducks....I must let Anita have pictures as soon as I know who made them.