For the past three years my niece has volunteered at a wildlife rescue center. They get both of these birds (sparrows and starlings) and they euthanize almost 100% them because they're invasive to Canada and the US. After they are euthanized they are used as food for the owls, I understand. However, the director and I recently ran into each other and he said that on occasion they will adopt them out to people in pet-only homes because this is legal. I asked him what the primary differences were in pet quality and he said he did not really have an opinion because to him they are "food animals." I had a cockatiel for 9 years so I am not entirely unfamiliar with birds. In the spring if people start bringing in fledgling sparrows and starlings I might see if I can adopt one. But I know next-to-nothing about what each bird is like as a pet. I have called around and actually found two veterinarians who would treat them, which surprised me to be honest. I am wondering if anybody here has kept both and can compare them as pets (not as wild birds or as pests). Any feedback? Thank you.