A male Chinese penduline tit, which is deemed the architect among all bird species, was busy courting a female tit around the basket-shaped nest that it had carefully constructed.
The nest is mainly made up of wool and catkins, and the particular shape requires very sophisticated climbing, flying and knitting skills.
(All images via VCG)
(If you want to contribute and have specific expertise, please contact us at nature@cgtn.com.)