Twig Tea

बाह्याभ्यन्तरविषयाक्षेपी चतुर्थः 

bahyabhyantara visayaksepi chaturthah 

The fourth (kind of pranayama) is transcending internal and external objects.

Yoga Sutras of Patanjali, 2.51

bahya = external
abhyantara = internal
vishaya = object
akshepi = transcending
chaturthah = the fourth

Birds seem to be a bit like this in the way they are part of the external (a flock) and the internal (the individual bird).