Papaya plant that grows by itself

We did not plant papaya but we had several plants already that gave us fruits. Maybe the birds have been pecking on ripe papayas in the tree that they scattered the seeds in our backyard. Now that the tree is bearing fruits then I probably have to thank the birds for planting the seeds of the papaya here.

Another tree that is courtesy of the birds is the guava in our front yard. It grew by itself and we just let it stay. Now the guava tree has been fruiting for a year already and continuously. Thanks again to the birds.