a mob of crows
cawing in the wintry sky ...
a phalanx
of policemen
in riot gear
Added:
the rust-colored
twenty-foot-high border wall
draped with razor wire
stretches to the horizon ...
raven after raven croaking
FYI: For more examples about atmospheric tanka, see To the Lighthouse: Atmospheric Tanka
Added: The following is a response tanka (not atmospheric one) to the "border wall"tanka:
the howling
of winter wind
through barbed wire ...
an old man stares
in piercing silence