You can sue for the return of the bird. Consult with an attorney in your area. Keep in mind though that just because a person still has adoption records does not prove that he/she did not subsequently sell or give an animal to another person. When one voluntarily places an animal in another person’s possession, and the other person is not a boarding facility, it may be difficult to convince a court that the arrangement was temporary (unless there is a written agreement which states such terms). Saying that you were concerned about the woman’s living conditions and then giving her the bird anyway (even temporarily) may not work in your favor.