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

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

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

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

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