Editor's note: "Hidden World of Birds in City" is about exploring a world of birds that usually goes unnoticed in urban spaces. This episode features photographs from Wang Xiaobo, who has been bird-watching near his residential community in Beijing for the past eight years.

After a scorching but quiet summer, some birds have started to get active again. Just on Monday, Wang witnessed a breathtaking moment where a black-crowned night heron narrowly escaped the powerful claws of a peregrine falcon that, according to Wang, rarely has conflicts with other birds their size. With a swift, sudden turn, the lucky heron managed to escape the bully and flew away.

As the weather cools down, another bird migration will begin in most parts of China. Based on Wang's experience, the bird population during this migration is usually much less than the number seen in the spring migration every year. 

More from 'Hidden World of Birds in City':

Hidden World of Birds in City: The story of the pond continues

Hidden World of Birds in City: Story of the little grebe's pond life

Hidden World of Birds in City: Moments to remember Part 2

Hidden World of Birds in City: Moments to remember Part 1

Hidden World of Birds in City: Hope for a better year

Hidden World of Birds in City: Small surprises in hot summer

Hidden World of Birds in City: Parenting

Hidden World of Birds in City: New life, new hope

Hidden World of Birds in City: Aiming to create a new record high

Hidden World of Birds in City: Peaks ended but migration lingers

Hidden World of Birds in City: New migration peak

Hidden World of Birds in City: Beauty captured on the way

Hidden World of Birds in City: Catching the train of late spring

Hidden World of Birds in City: Welcome back

Hidden World of Birds in City: Birds in blossom

Hidden World of Birds in City: A busy pond

Hidden World of Birds in City: Highlights

Hidden World of Birds in City: Air predators

Hidden World of Birds in City: Migratory birds

Hidden World of Birds in City: The birds awaken

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