the.com/redstart

A tiny firebird that shivers its tail like it's permanently buffering a panic attack.

means A small songbird of the Old World (and unrelated American species) known for its rusty-red tail, which it often quivers and flicks.

from From 'red' plus 'start,' where 'start' is an old English word for tail — the same 'steort' that survives, hidden, in 'redstart' long after we stopped calling tails 'starts.' So the name literally means 'red-tail,' a plain description preserved in linguistic amber from the days of Old English 'steort,' a cousin of words across the Germanic languages for tail or rump.

tail trick
Constantly quivers its rusty tail to flush out hiding insects
name origin
Start meant tail in Old English, not beginning
two families
Old and New World redstarts are unrelated, just similarly flashy
long haul
Common redstarts winter in sub-Saharan Africa
sound
Song often ends in a strange mechanical rattle
for instance

common redstart — small thrush found across europe and asia, males have orange-red breast and tail

american redstart — warbler species native to north america, males black with orange patches on wings and tail

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