They have a selection of birds of prey here from a variety of countries. You can see the recently re-introduced golden eagle, sea eagle and kite. They have the native barn owl (the only place I have seen one). You do pay to get in. You can park in Russborough house as the the centre is on the far side of the building. It costs €2 for parking. They do a tour of the birds and give a lot of interesting information. They also do a demonstration outside in one of the fields with some of the birds. Not sure how often they do the demonstration though. You can also hold some of the birds with a glove.

You MUST SEE the National Birds of Prey Center also on the same property as the Russborough House. We were the only people there when we went so we basically got a private tour of the facility which was an in depth explanation of each of the birds we saw. Very interesting! We learned so much & had so much fun!
We had previously booked the 'owl experience' so we also got to hold 5 different kinds of owls & learn all about them. I cannot highly recommend this place enough! It's a once in a lifetime experience to handle the owls. They are beautiful up close. Calm & you get to pet them & fly one of the owls. DO IT!!!!!!!!!!!!
You can also do falconry here.