Dear Marmam and ECS members, Drones have given us the possibility to observe and record cetaceans from above in a way that we could not even dream before. An example is shown in a video that we wish to share with you regarding sperm whale behaviour within the framework of a social unit. In a 3 min video with aerial views of one social unit gathered at surface, you can observe what provoked the tail-slapping behaviour of a presumably immature male. When we were observing it from our vessel we had no explanation, since we could see almost nothing of what is visible from above. The video is available at the following Youtube link: https://youtu.be/nUK_6bkvHM8 <https://youtu.be/nUK_6bkvHM8> or in our Youtube channel: https://www.youtube.com/channel/UCVyp-eiteK0GBb0Lr5psk0g You can freely share the video. Any comments you may have regarding the observed behaviour are very welcome. Best wishes, Alexandros -- ___________________________________________ Dr. Alexandros Frantzis Scientific director Pelagos Cetacean Research Institute Terpsichoris 21 16671 Vouliagmeni, GREECE Tel.: +30-210-8960108 e-mail: afrantzis@otenet.gr website: http://www.pelagosinstitute.gr ___________________________________________ -- This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus