Are these authentic, if so what age are they? If replica what age are they?
If you do not know if they are authentic or replica's you will need to take these to an appraiser so they can look at them in person, there is no way to tell if they are authentic online. Online is very limited since we cannot look at the items in person, so authentication has to be done in person. I can help you find an appraiser you can take it to in your area or close to you. You can take this to them to see if it is in fact authentic and an estimated value.
Yes, I can see the questions that you have asked. I also have reviewed items and given values. If an age is in doubt, that will effect the value of an item, such as this could. They should always be looked at in person to determine the correct age. There is no way to determine how old an item is based on a picture, not when it is something like this that could be made out of Resin, or composite material. I can give values based on the fact that the customer knows they are real or replica.
The Head is not carved though right? It appears to be a real head. Before your images for the bird was not showing up but, I can see it now, and it appears to be authentic. What size is the bird?
There is nothing here.