Owls and hawks are predators not only to rodents on our properties but also to the smaller birds such as the sparrows or chickadees. Homeless cats are most destructive at night and early morning hours.
Dogs tend to be less serious due to their inability to catch birds, but still pose a threat.
Dogs should not be unattended during the nesting season since they pose a problem for ground-nesting birds. Some bird nests are destroyed by foxes, opossums, weasels, racoons and snakes and waterfowl and game birds suffer loss from raccoons and foxes. It's hard to believe that even Humans are predators to birds. Direct destruction of birds occurs when they are killed for food, feathers, sport and even museum specimens. During hunting season, birds are often killed by hunters simply because they offer a moving target and sometimes birds are killed by us just simply driving our cars.