Close up of one of the world's rarest birds, Aldabra rail, last flightless bird of the Indian Ocean, Dryolinnas cuvieri aldabranus

World's rarest parrakeet (Psittacula eques echo), Shoals of Capricorn, Mauritius Wildlife Foundation, Mauritius, Africa

Fijian crested iguana, endemic to Fiji, Brachylophus vitiensis, one of the world's rarest reptiles, Kulu Wildlife Park, Fiji, Pacific Islands, Pacific

A Johnny Rook or Striated Caracara (Phalcoboenus australis), one of the world's rarest birds of prey, resting on the beach of Sea Lion Island in the Falklands, South Atlantic with elephant seals behind.

A pair of Johnny Rook or Striated Caracara (Phalcoboenus australis) birds, one of the world's rarest birds of prey, resting on the beach of Sea Lion Island in the Falklands, South Atlantic. Behind are elephant seals.

Zanzibar Red Colobus monkey, one of Africa's rarest primates

Zanzibar Red Colobus monkey, one of Africa's rarest primates

Zanzibar Red Colobus monkey, one of Africa's rarest primates

Zanzibar Red Colobus monkey, one of Africa's rarest primates

Zanzibar Red Colobus monkey, one of Africa's rarest primates

Zanzibar Red Colobus monkey, one of Africa's rarest primates

A Johnny Rook or Striated Caracara (Phalcoboenus australis), one of the world's rarest birds of prey, resting on the beach of Sea Lion Island in the Falklands, South Atlantic.

Red Colobus monkeys. One of Africa's rarest primates

Zanzibar Red Colobus monkey, one of Africa's rarest primates

Zanzibar Red Colobus monkey, one of Africa's rarest primates

Zanzibar Red Colobus monkey, one of Africa's rarest primates

Zanzibar Red Colobus monkey with young, one of Africa's rarest primates

Flightless cormorant (Nannopterum harrisi) in the Galapagos Island Group, Ecuador. This Galapagos endemic cormorant has lost the ability to fly as there are no predators in the islands to prey on it.

Flightless cormorant (Nannopterum harrisi) in the Galapagos Island Group, Ecuador. This Galapagos endemic cormorant has lost the ability to fly as there are no predators in the islands to prey on it.

Transit of Venus Across Sun, TRACE, 2004

Transit of Venus Across the Sun, 2012

Venus Transit Approach, 2012

Striated Caracara (Phalcoboenus australis) or Johnny Rook, considered as very intelligent and curious, one of the rarest birds of prey in the world. South America, Falkland Islands, January

Striated Caracara (Phalcoboenus australis) or Johnny Rook, considered as very intelligent and curious, one of the rarest birds of prey in the world. South America, Falkland Islands, January

Striated Caracara (Phalcoboenus australis) or Johnny Rook, considered as very intelligent and curious, one of the rarest birds of prey in the world. South America, Falkland Islands, January