Sinitiiva (Sinitiib)

Lit. blue wing, but take your pick:

• Kevad-sinitiib, holly blue, Celastrina argiolus
• Kukeharja-sinitiib, chequered blue, Scolitantides orion
• Liivatee-sinitiib, (eastern) baton blue, Pseudophilotes vicrama
• Lutserni-sinitiib, green-underside blue, Glaucopsyche alexis
• Niidu-sinitiib, mazarine blue, Cyaniris semiargus
• Siilak-sinitiib, short-tailed blue, Everes argiades
• Tähnik-sinitiib, large blue, Maculinea arion

Part of a lepidopteran group. See also Sirptiiva.

Sipelga (Sipelgas)

Ant. One clever building company decided to entice buyers with the tempting condo name of Sipelgapesa, Ants’ Nest. Bet that got punters itching to buy. Part of an insect street-name group. See Sääse.

Sirbi (Sirp)

Sickle. Where we say ‘hammer and sickle’, they say sirp ja vasar (see Vasara).