Also, the exact question you're trying to answer makes a difference. If the question is, "Is this a picture of a bird?" where "of a bird" means that the primary

Also, the exact question you're trying to answer makes a difference. If the question is, "Is this a picture of a bird?" where "of a bird" means that the primary focus of the picture is a single bird, then your picture should return "No". That's different than, "Are there one or more birds in this picture?" I'm not sure which question Flickr's team actually seeks to answer here.