Sea Turtle Tracking
These are the different individuals that we have been able to identify by collecting and analyzing all the pictures posted on VIZ.
By comparing the patterns on the skin and the shell we can link a sighting (picture) to a sea turtle in our database or create a new record if there is no match.
The goal is to have a sense of how many different sea turtles are spotted in Sydney, which is an information that has never been available before. Also, we can see how long sea turtles stay in one place and if they come back or switch site.
Interestingly, a number of sea turtles stay in one site for months before disappearing and then reappearing months after in the very same place. None of them has been found in more than 1 site.
70% of them are Green Turtles (Endangered) and 30% Hawksbill (Critically Endangered).
Sea Turtles are found within a huge range of latitudes, from Japan to our coast all the way down to Narooma. For many countries, seeing a sea turtle in the wild is synonymous of extensive travelling to tropical destinations, but thanks to the East Australian Current we find them right at our doorstep, for the very last bit of their North-South migrations.
The project has been running since the start of the VIZ group in June 2019. It's a significant investment of time, but it allows to preserve and share the information contained in the visibility reports, that otherwise would sink into oblivion in the Facebook feed.
Check out the other derivate we produce from visibility reports: the VIZ Tracking Project