Thankfully I have been out birding in the field in Tanzania most of these past five weeks!
In life these birds seemed to me to be much darker on the upperparts.
They portray two, of at least six different individual birds, hunting queleas in early February at Ol Mesera.
None were at the very first site (Ol Mesera 15km north of Mto wa Mbu) on Saturday/Sunday last - presumably because there were no Red-billed Queleas remaining there in the grasslands of the Maasai set-aside, only Chestnut Sparrows.
None were at the early February site (Ol Mesera Tented Camp is 15km north of Mto wa Mbu) on Saturday/Sunday last - I believe that is because there were very few Red-billed Queleas remaining there in the tall grasslands of the new-style Maasai pasture set-aside, only Chestnut Sparrows.
I suspect that the Levant Sparrow Hawks have become adapted to following queleas in their opportunistic breeding movements, and do so probably right across Central African Republic, Chad, the South Sudan and into Ethiopia.
It's just a hunch, guess that it's dynamic qualitative ecology, based on what I watched over those three days last week.