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 witnessing the unprecedent spike two days ago since Wang began his bird-watching "career", he predicts that the migration might shrink both in number and variety of birds from this point on, but it won't completely disappear as some small-sized birds are still trying to catch the late train.

Wang took another brief look in his community yesterday and was still taken by some surprises. 

More from 'Hidden World of Birds in City':

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

(If you want to contribute and have specific expertise, please contact us at nature@cgtn.com.)