What is it like to ring birds in the place in the world with the greatest diversity of birds?

The ornithological expedition at the Manu Bird Observatory followed the route of the sampling stations in the Kosñipata Valley (Cuzco). A project established with the authorization of SERFOR (Government of Peru), with the support of the University of Barcelona as well as various scientific institutions in Europe, America and Peru. The objective is to establish a Constant Effort Site (CES). A much more complex purpose than the CES in Europe or North America due to the arduous displacement, the inaccessibility of the sampling areas and the conditions typical of the cloud and rain forest. The chosen date, October, also prioritizes residents. The southern winterers have already left and only occasionally some species of internal movement in South America were captured (such as Lathrotriccus euleri). On the other hand, the boreal winterers have not yet arrived en masse. Only the punctual Catharus ustulatus and the first Vireo olivaceus, among others. Thus, most of the captured birds were residents. The team of experts sampled in the different areas preselected in previous years. At the same time, they obtained some recaptures (and two external captures) that show the territorial permanence of some species or certain movements through the valley. Among others, the recaptures of the hummingbird Campylopterus largipennis or the swift Streptoprocne zonaris ringed in 2020 or a Rupicola peruvianus and a hummingbird Thalurania furcata ringed in 2021 down the valley, both 12 km away.
The CES was established and in 2025 the second station is expected to be set, once all the parameters have been observed.