Did you eat an orange in my yard?

Someone ate an orange in my yard. Or rather, did not eat an orange.... There is most of an orange in pieces - so far I've found three - strewn about the backyard. We have not had oranges lately and it looks like someone did this earlier today by the condition of the fruit (and lack of ants). I'm completely puzzled. Why would someone chuck an orange into our backyard?? Is there some secret to gardening whereas you appease the gardening gods by leaving fruit out for them? Such a mystery.