Neil Lucas / Dragons blood tree (Dracena cinnibaris) reflected, Socotra, Yemen, February 2007. Digitally created image

Neil Lucas / Sun shining through the branches of a Dragons blood tree (Dracena cinnibaris) in mountainous desert, Socotra, Yemen, February 2007

Neil Lucas / Dragons blood trees (Dracena cinnibaris) and Desert rose (Adenium obesum socotranum) in Momi Valley, Socotra Island, Yemen, February 2008

Hanne & Jens Eriksen / Lesser crested tern {Thalasseus bengalensis} flock on beach, large gulls and waves in background, Socotra, Yemen

Michael D. Kern / Socotra Island Blue Baboon Tarantula (Monocentropus balfouri) captive from Yemen

Sebastian Kennerknecht / Golden-winged Grosbeak (Rhynchostruthus socotranus) male, Hawf Protected Area, Yemen

Hanne & Jens Eriksen / Socotra cormorant {Phalacrocorax nigrogularis} flock on beach, Oman, November

Neil Lucas / Two Dragons blood trees (Dracena cinnibaris) Momi Valley, Mountains, Socotra, Yemen, June 2007

Neil Lucas / Desert Rose (Adenium obesum socotranum) in flower, Momi Valley, Socotra, Yemen

Neil Lucas / Dragons blood tree (Dracena cinnibaris) in mountainous desert, Socotra, Yemen, February 2007

Neil Lucas / View of the sky looking through the branches of a Dragons blood tree (Dracena cinnibaris) in mountainous desert, Socotra, Yemen, February 2007

Neil Lucas / Dragons blood trees (Dracena cinnibaris) in mountainous desert, Socotra, Yemen, February 2007

Neil Lucas / Dragons blood tree (Dracena cinnibaris) in mountainous desert, Socotra, Yemen

Neil Lucas / Dragons blood tree (Dracena cinnibaris) silhouetted against night sky with stars, Socotra, Yemen, February 2007

Neil Lucas / Dragons blood tree (Dracena cinnibaris), Momi Valley, Mountains, Socotra, Yemen, June 2007

Neil Lucas / Dragons blood tree (Dracena cinnibaris), Momi Valley, Mountains, Socotra, Yemen, June 2007

Neil Lucas / Dragons blood tree (Dracena cinnibaris) in mountainous desert, Socotra, Yemen

Neil Lucas / Dragons blood tree (Dracena cinnibaris) in mountainous desert, Socotra, Yemen, February 2007. Did you know? Dragons blood trees are so called because of the red sap they produce.

Neil Lucas / Desert Rose (Adenium obesum socotranum) in flower, Momi Valley, Socotra, Yemen, February 2007

Neil Lucas / Arabian camel (Camelus dromedarius) and rider, walking in desert landscape, Socotra, Yemen, February 2007

Neil Lucas / Flowering Desert rose (Adenium obesum socotranum), Momi Valley, Socotra, Yemen

Hanne & Jens Eriksen / Socotra cormorant (Phalacrocorax nigrogularis) flock on water. Dhofar, Oman.

Hanne & Jens Eriksen / Somali starling {Onychognathus blythii} male in bush, Socotra, Yemen

Hanne & Jens Eriksen / Somali starling {Onychognathus blythii} pair in bush, male (below) and female, Socotra, Yemen

Hanne & Jens Eriksen / Kentish plover {Charadrius alexandrinus} chick, Socotra, Yemen

Hanne & Jens Eriksen / Socotra cormorant {Phalacrocorax nigrogularis} resting on buoy, Ras Al Khaimah, UAE

Hanne & Jens Eriksen / Somali starling {Onychognathus blythii} female in bush, Socotra, Yemen

Hanne & Jens Eriksen / Kentish plover {Charadrius alexandrinus} on mud flats, Socotra, Yemen

Hanne & Jens Eriksen / Socotra cormorant {Phalacrocorax nigrogularis} flock of juveniles in front of fishing equipment, Ras Al Khaimah, UAE

Hanne & Jens Eriksen / Black winged stilt {Himantopus himantopus} two near water, female with immature, backlit, Socotra, Yemen

Hanne & Jens Eriksen / Cucumber trees {Dendrosicyos socotrana} on coast near Hadibo, Socotra, Yemen

Hanne & Jens Eriksen / Cucumber tree {Dendrosicyos socotrana} on coast near Hadibo, Socotra, Yemen

Hanne & Jens Eriksen / Socotra sunbird {Nectarinia balfouri}, feeding on {Trichocalyx obovatus} flower, Wadi Ayhaft, Socotra Island, Yemen

Hanne & Jens Eriksen / Long billed pipit {Anthus similis} perched in bush, singing, Diham, Socotra Island, Yemen

Hanne & Jens Eriksen / Socotra rock gecko {Pristurus sokotranus}, Wadi Ayhaft, Socotra Island, Yemen

Hanne & Jens Eriksen / Long billed pipit {Anthus similis} perched in bush, Diham, Socotra Island, Yemen

Hanne & Jens Eriksen / Socotra sunbird {Nectarinia balfouri}, in {Trichocalyx obovatus} tree, Wadi Ayhaft, Socotra Island, Yemen

Hanne & Jens Eriksen / Purple tarantula spider {Monocentropus balfouri}, Wadi Ayhaft, Socotra Island, Yemen

Hanne & Jens Eriksen / Socotra scops owl {Otus socotranus} in palm tree, Hadibo, Socotra Island, Yemen

Hanne & Jens Eriksen / Long billed pipit {Anthus similis} perched in bush, with food, Diham, Socotra Island, Yemen

Hanne & Jens Eriksen / Socotran desert rose {Adenium obesum sokotranum} flowering, Dieksum, Socotra Island, Yemen

Hanne & Jens Eriksen / Purple tarantula spider {Monocentropus balfouri}, Wadi Ayhaft, Socotra Island, Yemen

Hanne & Jens Eriksen / Socotra sparrow {Passer insularis} male on branch, Socotra Island, Yemen

Hanne & Jens Eriksen / Man teaching boys about the environment, Wadi Qarad, Socotra Island, Yemen

Hanne & Jens Eriksen / Socotran desert rose {Adenium obesum sokotranum} flowering in desert, Dieksum, Socotra Island, Yemen

Hanne & Jens Eriksen / Socotra sparrow {Passer insularis} male on twig, Socotra Island, Yemen

Hanne & Jens Eriksen / Lichtenstein's sandgrouse {Pterocles lichtensteinii}, female, on stony ground, Socotra Island, Yemen

Hanne & Jens Eriksen / Socotran desert rose {Adenium obesum sokotranum} flowers, Dieksum, Socotra Island, Yemen

Hanne & Jens Eriksen / Socotra bunting {Emberiza socotrana} on rock, Dieksum, Socotra Island, Yemen

Hanne & Jens Eriksen / Socotra starling {Onychognathus frater}, perched in bush, Dieksum, Socotra Island, Yemen

Hanne & Jens Eriksen / Somali starling {Onychognathus blythii} female on twig, Socotra Island, Yemen

Hanne & Jens Eriksen / Dragon's blood tree {Dracaena cinnabari} Dieksum, Socotra Island, Yemen

Hanne & Jens Eriksen / Socotra starling {Onychognathus frater}, perched in bush, Dieksum, Socotra Island, Yemen

Hanne & Jens Eriksen / Lichtenstein's sandgrouse {Pterocles lichtensteinii}, male, on stony ground, Socotra Island, Yemen

Hanne & Jens Eriksen / Kentish plover {Charadrius alexandrinus} stretching, Khawr Ghubah, Socotra Island, Yemen

Hanne & Jens Eriksen / Socotra cormorant {Phalacrocorax nigrogularis} on rock, Qalansiyah, Socotra Island, Yemen

Hanne & Jens Eriksen / Lichtenstein's sandgrouse {Pterocles lichtensteinii} male, on stony ground, Socotra Island, Yemen

Hanne & Jens Eriksen / Brown booby {Sula leucogaster} calling on cliff wall, Qalansiyah, Socotra Island, Yemen

Hanne & Jens Eriksen / Socotra starling {Onychognathus frater}, feeding, on rock, Dieksum, Socotra Island, Yemen

Hanne & Jens Eriksen / Socotra freshwater crab {Socotrapotamon socotrensis}, on rock, Dieksum, Socotra Island, Yemen

Hanne & Jens Eriksen / Socotra sunbird {Nectarinia balfouri}, feeding on {Trichocalyx obovatus} flower, Wadi Ayhaft, Socotra Island, Yemen

Hanne & Jens Eriksen / Socotra rock gecko {Pristurus sokotranus}, Wadi Ayhaft, Socotra Island, Yemen

Hanne & Jens Eriksen / Egyptian vulture (Neophron percnopterus), Socotra, Yemen

Hanne & Jens Eriksen / Socotra cisticola {Cisticola haesitatus} with breeze ruffling feathers, Wadi Sirhin, Socotra, Yemen

Hanne & Jens Eriksen / Socotra cisticola {Cisticola haesitatus}, Wadi Sirhin, Socotra, Yemen

Hanne & Jens Eriksen / Cream coloured courser (Cursorius cursor) feeding chick, Hadobo, Socotra, Yemen

Hanne & Jens Eriksen / Golden winged grosbeak {Rhynchostruthus socotranus socotranus}, Wadi Ayhaft, Socotra, Yemen

Hanne & Jens Eriksen / Socotra cisticola {Cisticola haesitatus}, Wadi Sirhin, Socotra, Yemen

Hanne & Jens Eriksen / Cream coloured courser (Cursorius cursor) with grasshopper in mouth, Hadobo, Socotra, Yemen

Hanne & Jens Eriksen / Golden winged grosbeak {Rhynchostruthus socotranus socotranus}, Wadi Ayhaft, Socotra, Yemen

Hanne & Jens Eriksen / Socotra warbler {Incana / Cisticola incana}, Diksum, Socotra, Yemen

Hanne & Jens Eriksen / Socotra warbler {Incana / Cisticola incana}, Diksum, Socotra, Yemen

Hanne & Jens Eriksen / Golden winged grosbeak {Rhynchostruthus socotranus socotranus} at water, Wadi Ayhaft, Socotra, Yemen

Hanne & Jens Eriksen / Golden winged grosbeak {Rhynchostruthus socotranus socotranus} by water, Wadi Ayhaft, Socotra, Yemen

Hanne & Jens Eriksen / Socotra Cormorant {Phalacrocorax nigrogularis} in flight, Hawar Island, Bahrain.

David Shale / Aerial view of Socotra cormorant nesting colony {Phalacrocorax nigrogularis} Hawar Is, Bahrain - photographed during making of BBC Planet Earth series

David Shale / Socotra cormorant nest colony, Hawar Island Bahrain - photographed during making of BBC Planet Earth series

David Shale / Socotra cormorant colony {Phalacrocorax nigrogularis} United Arab Emirates, photographed during making of BBC Planet Earth series

Hanne & Jens Eriksen / Socotra cormorant (Phalacrocorax nigrogularis) colony on beach at Hawar Island, Bahrain, October

Hanne & Jens Eriksen / Socotra cormorant (Phalacrocorax nigrogularis) standing on gravel with two eggs. Hawar Island, Bahrain, October

David Shale / Socotra cormorant (Phalacrocorax nigrogularis) colony on a beach at Hawar Island, Bahrain

David Shale / Socotra cormorant (Phalacrocorax nigrogularis) colony on a beach at Hawar Island, Bahrain

David Shale / Aerial view of Socotra cormorant {Phalacrocorax nigrogularis} colony, Hawar Is, Bahrain

Hanne & Jens Eriksen / Four Socotra cormorants (Phalacrocorax nigrogularis) in flight against blue sky over Hawar Island, Bahrain, October

Hanne & Jens Eriksen / Socotra cormorant (Phalacrocorax nigrogularis) in flight against blue sky over Hawar Island, Bahrain, October

Hanne & Jens Eriksen / Socotra cormorant (Phalacrocorax nigrogularis) standing in shallow water, Hawar Island, Bahrain, October

Hanne & Jens Eriksen / Socotra cormorant (Phalacrocorax nigrogularis) in flight against blue sky over Hawar Island, Bahrain, October