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Group of birdwatchers from QNHG (Qatar Natural History Group) on a service road near Abu Nakhla wastewater treatment ponds. Doha, Qatar, March 29, 2014

Birdwatching with QNHG (Qatar Natural History Group) near Abu Nakhla wastewater treatment ponds. Doha, Qatar, March 29, 2014

Watching birds with QNHG (Qatar Natural History Group) near Abu Nakhla wastewater treatment ponds. Doha, Qatar, March 29, 2014

Group of birdwatchers from QNHG (Qatar Natural History Group) looking for a white owl near Green Circles (center-pivot irrigation) in Irkhaya Farms. South-western Qatar, March 29, 2014

Evans bluetail damselfly (Ischnura evansii) near Abu Nakhla wastewater treatment ponds. Doha, Qatar, March 29, 2014

Group of bird watchers from QNHG (Qatar Natural History Group) on Green Circles (center-pivot irrigation) in Irkhaya (Irkaya) Farms. South-western Qatar, March 5, 2016

Group of bird watchers from QNHG (Qatar Natural History Group) near a pond outside of Green Circles (center-pivot irrigation) in Irkhaya (Irkaya) Farms. South-western Qatar, March 5, 2016

Bright mature male broad scarlet dragonfly (Crocothemis erythraea) near Abu Nakhla wastewater treatment ponds. Doha, Qatar, March 29, 2014

A dog of Qatar Natural History Group (QNHG) in sands of Harrarah, 40 miles south-west from Doha. Qatar, March 2, 2012

Broad scarlet dragonfly (Crocothemis erythraea) in obelisk position near a service road of Abu Nakhla wastewater treatment ponds. Doha, Qatar, March 29, 2014

Female broad scarlet dragonfly (Crocothemis erythraea) holding its abdomen up (obelisk position) near Abu Nakhla wastewater treatment ponds. Doha, Qatar, March 29, 2014

Qatar Natural History Group (QNHG) at Jazirat Umm Tays, barrier island at northern tip of Qatar, east from Ruwais, March 24, 2012

Plywood mosque near Abu Nakhla wastewater treatment ponds. Doha, Qatar, February 27, 2015

Old plywood mosque near Abu Nakhla wastewater treatment ponds. Doha, Qatar, February 27, 2015

Qatar Natural History Group (QNHG) on dunes of Jazirat Umm Tays, barrier island at northern tip of Qatar, east from Ruwais, March 24, 2012

Qatar Natural History Group (QNHG) near a fishing shack in Jazirat Umm Tays, barrier island at northern tip of Qatar, east from Ruwais, March 24, 2012

Members of the Qatar Natural History Group (QNHG) exploring glittering gypsum pavement (selenite) during fossil trip in area of Jebel Al-Nakhsh in south-western Qatar, February 7, 2014

Beaked tasselweed (widgeongrass, Ruppia maritima) taken from Abu Nakhla wastewater treatment ponds. Doha, Qatar, February 27, 2015

Clump of beaked tasselweed (widgeongrass, Ruppia maritima) taken from Abu Nakhla wastewater treatment ponds. Doha, Qatar, February 27, 2015

Roots of beaked tasselweed (widgeongrass, Ruppia maritima) taken from Abu Nakhla wastewater treatment ponds. Doha, Qatar, February 27, 2015

Qatar Natural History Group (QNHG) looking at fossilized dugong bones embedded in desert floor under the guidance of a geologist Jacques LeBlanc in area of coastal sabkha in south-western Qatar, February 7, 2014

Narrow leaves of beaked tasselweed (widgeongrass, Ruppia maritima) taken from Abu Nakhla wastewater treatment ponds. Doha, Qatar, February 27, 2015

Beaked tasselweed (widgeongrass, Ruppia maritima) with roots extracted from Abu Nakhla wastewater treatment ponds. Doha, Qatar, February 27, 2015

Brittle naiad aquatic plant (Najas marina) with roots taken from Abu Nakhla wastewater treatment ponds. Doha, Qatar, February 27, 2015

Brittle naiad aquatic plant (Najas marina) extracted from Abu Nakhla wastewater treatment ponds. Doha, Qatar, February 27, 2015

Brittle naiad aquatic plant (Najas marina) submerged in Abu Nakhla wastewater treatment ponds. Doha, Qatar, February 27, 2015

Geologist Jacques LeBlanc at the foot of ancient lithified dune of red sand guiding a fossil tour for Qatar Natural History Group (QNHG) in area of Jebel Al-Nakhsh in south-western Qatar, February 7, 2014

Members of the Qatar Natural History Group (QNHG) exploring fossilised intertidal stromatolites (microbial mats, laminated sediments) during fossil trip in area of Jebel Al-Nakhsh in south-western Qatar, February 7, 2014

Qatar Natural History Group (QNHG) exploring fossilized dugong bones embedded in desert floor under the guidance of a geologist Jacques LeBlanc in area of coastal sabkha in south-western Qatar, February 7, 2014

QNHG (Qatar Natural History Group) watching birds on a small peninsula. Ruwais, Northern Qatar, April 3, 2015

Qatar Natural History Group (QNHG) wading near Al Mafjar village, northern area near Ruwais. Qatar, April 12, 2013

QNHG (Qatar Natural History Group) gathering in a tea hall in Trainah agricultural settlement. Southern Qatar, November 6, 2015

People from QNHG (Qatar Natural History Group) taking pictures of a lizard on periphery of Green Circles (center-pivot irrigation) in Irkhaya (Irkaya) Farms. South-western Qatar, March 5, 2016

Members of the Qatar Natural History Group (QNHG) under the guidance of a geologist Jacques LeBlanc exploring fossilised stromatolites (microbial mats) during fossil trip in area of Jebel Al-Nakhsh in south-western Qatar, February 7, 2014

Members of the Qatar Natural History Group (QNHG) exploring fossilized dugong bones embedded in desert floor under the guidance of a geologist Jacques LeBlanc in area of coastal sabkha in south-western Qatar, February 7, 2014

Qatar Natural History Group (QNHG) touring excavations at al-Ruwaydah, a late Islamic site near Ruwais in northern Qatar, May 3, 2013

QNHG (Qatar Natural History Group) heading to watch birds on a small peninsula. Ruwais, Northern Qatar, April 3, 2015

QNHG (Qatar Natural History Group) exploring a bone on a beach of a small peninsula. Ruwais, Northern Qatar, April 3, 2015

Spiny leaves of brittle naiad aquatic plant (Najas marina) from Abu Nakhla wastewater treatment ponds. Doha, Qatar, February 27, 2015

Brittle naiad aquatic plant (Najas marina) on dark background taken from Abu Nakhla wastewater treatment ponds. Doha, Qatar, February 27, 2015

Members of the Qatar Natural History Group (QNHG) exploring area of gypsum crystal pavement (selenite) during fossil trip in area of Jebel Al-Nakhsh in south-western Qatar, February 7, 2014

Toothed leaves of brittle naiad aquatic plant (Najas marina) extracted from Abu Nakhla wastewater treatment ponds. Doha, Qatar, February 27, 2015

Mihrab (semicircular prayer niche) in qibla wall inside old plywood mosque near Abu Nakhla wastewater treatment ponds. Doha, Qatar, February 27, 2015

Toothed leaves of brittle naiad aquatic plant (Najas marina) on dark background taken from Abu Nakhla wastewater treatment ponds. Doha, Qatar, February 27, 2015

Toothed leaves of brittle naiad aquatic plant (Najas marina) with serrate edges taken from Abu Nakhla wastewater treatment ponds. Doha, Qatar, February 27, 2015

Ethiopian hedgehogs rolled into prickly balls in Rawdat Al Faras Research Station (RAFRS, or Qatar University Farm) near Al Zubara Road during a tour with Qatar Natural History Group (QNHG). Qatar, May 29, 2015

Ethiopian hedgehog (Paraechinus aethiopicus) rolled into a ball in Rawdat Al Faras Research Station (RAFRS, or Qatar University Farm) near Al Zubara Road during a tour with Qatar Natural History Group (QNHG). Qatar, May 29, 2015

Ethiopian hedgehog (Paraechinus aethiopicus) on a gardening glove at a short presentation of Qatar University for Qatar Natural History Group (QNHG) at the entrance of Rawdat Al Faras Research Station (RAFRS) near Al Zubara Road. Qatar, May 29, 2015

QNHG (Qatar Natural History Group) exploring fossils of the Middle Eocene Dammam Formation in a site on flanks of Rawdat Al Heshaimiya(?) depression south from Trainah. Southern Qatar, November 6, 2015

QNHG (Qatar Natural History Group) looking for fossils in Midra Shale of the Middle Eocene Dammam Formation in a site on flanks of Rawdat Al Heshaimiya(?) depression south from Trainah. Southern Qatar, November 6, 2015

QNHG (Qatar Natural History Group) exploring compact claystone (Midra Shale) of the Middle Eocene Dammam Formation at fossil site on flanks of Rawdat Al Heshaimiya(?) depression south from Trainah. Southern Qatar, November 6, 2015

QNHG (Qatar Natural History Group) exploring fossils in limestone layer (Dukhan Limestone Member) of Dammam Formation in Jaow Al Hamar depression south from Trainah. Southern Qatar, November 6, 2015

Qatar Natural History Group in desert. Harrarah, 40 miles south-west from Doha. Qatar, March 5, 2010

Qatar Natural History Group walking in desert. Harrarah, 40 miles south-west from Doha. Qatar, March 5, 2010

Qatar Natural History Group outing on limestone hills of Harrarah, 40 miles south-west from Doha. Qatar, March 5, 2010

Qatar Natural History Group discovered some small critter in desert. Harrarah, 40 miles south-west from Doha. Qatar, March 5, 2010

Qatar Natural History Group measuring depth of a pond between Al Wakra and Mesaieed, north from Doha. Qatar, January 29, 2010

Qatar Natural History Group wading at low tide in Arabian (Persian) Gulf near Mesaieed, north from Doha. Qatar, January 29, 2010

Qatar Natural History Group in Ras Abrouq peninsula in west central coastal area, north from Zekreet. Qatar, April 8, 2011

Dr. Petersen guiding a tour of a fort at Qal at Ruwayda archeological Site on northwest coast for Qatar Natural History Group. Qatar, February 6, 2010

Dr. Petersen in an excavated mound guiding a tour of Qal at Ruwayda archeological Site on northwest coast for Qatar Natural History Group. Qatar, February 6, 2010

Group of workers on construction of Qatar Petroleum (QP) Building West Bay sitting after a shift. Doha, Qatar, February 8, 2014

Group of workers on construction of Qatar Petroleum (QP) Building West Bay sitting at sunset after a shift. Doha, Qatar, February 8, 2014

Traditional group of women in Sheikh Faisal Bin Qassim Al Thani Museum near Al-Shahaniya. Doha, Qatar, February 15, 2014

Group of people at Friday evening south from Souq Najada. Doha, Qatar, March 16, 2012

Group of sheep in Animal Market, Wholesale Markets area. Doha, Qatar, March 22, 2012

Group of women in traditional dress in Sheikh Faisal Bin Qassim Al Thani Museum near Al-Shahaniya. Doha, Qatar, February 15, 2014

Group of goats in a truck in Sheep Market, Wholesale Markets area. Doha, Qatar, March 23, 2012

Group of workers meeting near Central Bus Station Al Ghanim on Friday evening. Doha, Qatar, March 9, 2012

Group of people with goats in Sheep Market, Wholesale Markets area. Doha, Qatar, March 30, 2012

Group of feeding camels in Animal Market, Wholesale Markets area. Doha, Qatar, March 14, 2012

Group of socializing animals in Camel Market, Wholesale Markets area. Doha, Qatar, March 29, 2012

Old plywood mosque near Abu Nakhla jail ponds (sewage lagoons). Qatar, April 18, 2015

Dried caked mud of Abu Nakhla jail ponds (sewage lagoons). Qatar, April 18, 2015

Group of standing camels at rain in Camel Market, Wholesale Markets area. Doha, Qatar, March 26, 2012

Instructing a group of workers, view from a window of Room 1-2244 of Ezdan Hotel. Doha, Qatar, March 7, 2016

Dried Abu Nakhla jail ponds (sewage lagoons), with caked mud at the bottom. Qatar, April 18, 2015

Texture of dried caked mud of Abu Nakhla jail ponds (sewage lagoons). Qatar, April 18, 2015

Shrinking water reservoir of Abu Nakhla jail ponds (sewage lagoons). Qatar, April 18, 2015

Dried caked mud on the bottom of Abu Nakhla jail ponds (sewage lagoons). Qatar, April 18, 2015

Group of migrant workers at Grand Hamad Intersection near Central Bus Station Al Ghanim on Friday. Doha, Qatar, March 16, 2012

Widgeon Grass (Ruppia maritima) in Abu Nakhla jail ponds (sewage lagoons). Qatar, April 18, 2015

Dried caked mud covering the bottom of Abu Nakhla jail ponds (sewage lagoons). Qatar, April 18, 2015

Group of camels leaking pressed salt and minerals in Camel Market, Wholesale Markets area. Doha, Qatar, March 21, 2012

Widgeon Grass (Ruppia maritima) with flowers in Abu Nakhla jail ponds (sewage lagoons). Qatar, April 18, 2015

Group of people in racing section of Camel Market, view from a gravel hill, wholesale markets area. Doha, Qatar, March 21, 2012

Blue dome and traces of a chandelier in a plywood mosque near Abu Nakhla jail ponds (sewage lagoons). Qatar, April 18, 2015

Aquatic plant Widgeon Grass (Ruppia maritima) taken from Abu Nakhla jail ponds (sewage lagoons). Qatar, April 18, 2015

Grass Sporobolus spicatus growing on dried bottom of Abu Nakhla jail ponds (sewage lagoons). Qatar, April 18, 2015

Group of sheep in a truck in Sheep Market, Wholesale Markets area. Doha, Qatar, March 30, 2012

Stand of aquatic plant Widgeon Grass (Ruppia maritima) in Abu Nakhla jail ponds (sewage lagoons). Qatar, April 18, 2015

Dying aquatic plant of brittle naiad (Najas marina) in Abu Nakhla jail ponds (sewage lagoons). Qatar, April 18, 2015

Dried aquatic plants of brittle naiad (Najas marina) in caked mud of Abu Nakhla jail ponds (sewage lagoons). Qatar, April 18, 2015

Fruits and a flower of aquatic plant Widgeon Grass (Ruppia maritima) taken from Abu Nakhla jail ponds (sewage lagoons). Qatar, April 18, 2015

Dense stand of aquatic plant Widgeon Grass (Ruppia maritima) in Abu Nakhla jail ponds (sewage lagoons). Qatar, April 18, 2015

Cluster of fruits of aquatic plant Widgeon Grass (Ruppia maritima) taken from Abu Nakhla jail ponds (sewage lagoons). Qatar, April 18, 2015

Group of desert date trees (lalob, Balanites aegyptiaca) on roadside of Salwa Highway near Saliyah military housing south-west from Doha. Qatar, March 25, 2016

Dried aquatic plants of brittle naiad (Najas marina) on muddy bottom of Abu Nakhla jail ponds (sewage lagoons). Qatar, April 18, 2015

Close up of membranous sheath of aquatic plant Widgeon Grass (Ruppia maritima) taken from Abu Nakhla jail ponds (sewage lagoons). Qatar, April 18, 2015