The birds swim in the waters in one of the ponds at the treatment site in Buterere. Arriving in Buterere at the site of the water purification sites, the participants were welcomed by the various birds' songs that they had the pleasure of observing. With open books, the hikers were able to identify and identify 19 species of birds that were in their path. Books served both for better identification and description, while binoculars allowed good observation of stealthy birds that cannot be easily approached. In his speech for the occasion, the President and Legal Representative of ABN, Mr. Arsène Manirambona, returned to the theme of the year by explaining that birds actually unite our world insofar as, depending on certain periods, birds can leave one continent to settle in another.