Vachellia erioloba owl bedroom

Below the leafy Vachellia erioloba crown, small twigs that live in shade most of the time lose leaves, eventually retaining only knobbly nodes. They tend to die off and disappear as the main stem and big branches gradually become bare higher up.

What does not contribute fades into redundancy, or functionality feeds survival (Coates Palgrave, 2002; Schmidt, et al, 2002; iNaturalist).