Wild Wonders of Europe / Widstrand / Greek land / Spur thighed tortoise (Testudo graeca) head portrait, Lake Kerkini, Macedonia, Greece, May 2009 WWE BOOK

Wild Wonders of Europe / Widstrand / Greek tortoise (Testudo graeca ibera) portrait, Lake Kerkini, Macedonia, Greece, May 2009

Wild Wonders of Europe / Widstrand / Greek land tortoise (Testudo graeca ibera) head portrait, Lake Kerkini, Macedonia, Greece, May 2009

George McCarthy / Spur thighed tortoise portrait {Testudo graeca} Island of Lesbos, Greece

Jose B. Ruiz / Male spur thighed tortoise on sand dune (Testudo graeca) Alicante, Spain.

Doug Gimesy / Researcher examining the spur of a platypus (Ornithorhynchus anatinus) that was captured as part of a Melbourne Water study into their distribution. Spurs can help a researchers age a male platypus. W...

Doug Gimesy / Researcher examining the spur of a Platypus (Ornithorhynchus anatinus) that was captured as part of a Melbourne Water study into their distribution. Spurs can help a researchers age a male platypus. W...

Doug Gimesy / Rear left ankle of a male platypus (Ornithorhynchus anatinus) held by a researcher showing venomous spur. Dartmouth, Victoria, Australia. May 2018.

Doug Gimesy / Rear left ankle of a male Platypus (Ornithorhynchus anatinus) showing venomous spur and ticks (Ixodes ornithothynchi). Dartmouth, Victoria, Australia. May 2018.

Doug Gimesy / Rear left ankle of a male Platypus (Ornithorhynchus anatinus) showing venomous spur. Healsville, Victoria, Australia. Collected about 15 minutes earlier as part of formal population monitoring researc...

Doug Gimesy / Platypus (Ornithorhynchus anatinus) male, close up of venomous spur of taxidermied animal. Belgrave, Victoria, Australia.

Cyril Ruoso / Ringed-tailed lemur (Lemur catta) group sleeping on granite rock spur at night. Anja Community Reserve, Madagascar.