Celine is the animal release center which works with IPBio. I was an eco-volunteer with IPBio, so I cannot say much on the work of Celine. I can say I really enjoyed working with the people at IPBio and I do believe that you would be working with the same folks (they are amazing people who really want to share their knowledge of the Atlantic Forest with you as well as make a very kind effort to get to know you - even if there is a communication barrier). I did do some gardening at Celine where we planted cassava roots, banana trees, and palm trees - work was among the more physical work I did during my time with IPBio but overall not unmanageably physical (the banana trees were smaller, and the palm trees were seeds - the tools for digging were the annoying part…). I also did 8 weeks of tree inventory on Celine's property to understand how the trees are growing in an effort to track forest stage (pioneering, secondary, etc.). Around the time I got here (June 2018), Celine had just got its official permit to start releasing animals, so the facility did not actually house any animals, but from what I have been told, it should start receiving animals soon. Although, on that note, it seems like it will only be birds; I remember reading/seeing online that they were releasing some mammals, but this doesn't seem to be the case for this new facility. I am not sure what volunteers will be doing for this facility in particular, but I hope that my review is helpful in reassuring you that the people you will be working for are great, the facilities you will stay in are clean, comfortable, and probably exceed your expectations, and that IPBio has good intentions in protecting and preserving the species of the Atlantic Forest (and they are very appreciative of their volunteers!).