Shark tracker
The World and Me
https://www.ined.fr/en/everything_about_population/population-games/world-population-me/
symbiosis
http://www.blueworldtv.com/webisodes/watch/symbiosis-in-the-sea
why the ocean matters
https://video.nationalgeographic.com/video/00000144-0a26-d3cb-a96c-7b2f454b0000
invasive species database
lyre bird vocals
https://www.youtube.com/watch?v=VjE0Kdfos4Y&feature=youtu.be
blue-footed boobie dance
https://www.youtube.com/watch?v=hgE6GwnzQMU&feature=youtu.be
killdeer
https://www.youtube.com/watch?v=TNG7y0caqj0&feature=youtu.be
sexual selection
https://www.youtube.com/watch?v=4j7GSu99LmY&feature=youtu.be