A genomic study published in the journal *Evolutionary Applications* says Hong Kong’s wild yellow-crested cockatoos may contain genetic diversity that could help conserve critically endangered cockatoos in Indonesia. Researchers report that Hong Kong’s introduced population retains unexpectedly high genetic variation, and could function as a “genetic reservoir” or “backup” by preserving lineages that may be disappearing elsewhere. The study, led by Astrid Andersson of the University of Hong Kong (HKU) School of Biological Sciences, highlights the conservation value of the city’s cockatoos beyond local biodiversity. Alongside the genetic findings, the research supports a conservation effort focused on improving nesting opportunities for the birds in Hong Kong. One outlet describes an initiative involving local schools to install artificial nest boxes and monitor the urban cockatoo population. Together, the reports emphasize that the genetic traits found in Hong Kong’s cockatoos may be relevant for long-term efforts to protect the species in its Indonesian range, where the birds are under severe threat.