Why do swans have a black lump on their nose?

What colour are a flies eyes? Are gray owls a scavenger? What is jade and dove a symbol of? Does the female pigeon look after the baby pigeon or does the male pigeon? Do you capitalize bird types? Do cranes or herons live in NJ wetlands? Can you keep bees and chickens? What will happen if wind turbines keep killing bats? What other countries do ostriches live on? What is the difference between a duck and a flamingo? Where did the male tom turkey get its name? Is brass safe for parrots? Where the heron lives? How has the peregrine falcon been affected by human behavior? What is the population of the southern cassowary? What makes a Horned puffin different from other species of puffins? Do emperor tamarins live in Australia? What bird has black and brown fur and a long neck? Penguins wing structure? Why does a male turkey gobble?