Nelson-Tasman: Evening Talk about Beaks and Spirals

Talk by Tony Aldridge.   Nowadays practically everyone has access to digital photographs. What seems unappreciated is the power of the humble camera to accurately measure nature. I'll explain how to do this with some Coprosma leaves, then some beaks from birds (finches, and a kaka), a few giant squid, and then brachiopods (lamp shells).   Spirals can be a surprisingly close match to beak shapes. However, it's what is NOT a spiral that allows me to extract periodicities or rhythms. Now the hard part – linking these rhythms to animal growth and climate.   I'll show what we currently know (and don't know) about the life history of giant squid and brachiopods plus possible links with climate.