Actually, Saudia Arabia has an abundance of bees… especially the Megachilidae … and perhaps 25 to 30 other subspecies. Most are rare in the western countries or those of more moderate climate… They've beens studied extensively such as A.M. Al-Ajlan[i
[i]Study on wild (solitary) bees as crop pollinators in Al-Hasa District Kingdom of Saudi Arabia] (published in 2004… updated 2010...
Additionally, during the heat of day, even here in the U.S., bees can be found near their hives flexing their wings in unison to cool the hive.
In Saudia, many of the plants would be night blooming which would also mean that they could be pollinated by a species of bats long known for their efficiency at such activity in the Arabian peninsula...