Coming In For A Landing.
My friend, part of a local murder, is checking to see if I am far enough away from the peanut he is eyeing to make a safe landing.
On the leading edge of the wing you can see a group of small feathers called the alula. Recent, 2015, studies using digital particle image velocimetry have determined that the alula causes a streamwise vortex increasing the lift force while enhancing the manoeuvrability when landing or flying at high angles of attack. The alula acts very similar to the leading edge slat of an airplane.
The northwestern crow is an all-black passerine bird of the crow genus native to the northwest of North America. It is very similar to the more western forms of the widespread American crow , but it averages slightly smaller with proportionately smaller feet and a slightly more slender bill. This taxon is reliably identified by range only.