Directional relative clauses (þangað sem / þaðan sem)

In English, we often use "where" for location, destination, or origin in a relative clause. In Icelandic, direction matters. When describing the journeys of a migratory bird (farfuglinn), you need specific phrases to show whether it is traveling toward or away from a destination.

Þangað sem (To where)

When an action involves movement towards a location, use þangað sem (to where). It is used with verbs of motion, such as flying, or even when directing one's gaze.

The migratory bird flies to where it lays eggs.
Farfuglinn flýgur þangað sem hann verpir.
The chick looks to where the food is.
Unginn horfir þangað sem fæðan er.
When the season changes, they fly to where it is warm.
Þegar árstíðin breytist fljúga þeir þangað sem hlýtt er.

Þaðan sem (From where)

When describing movement away from a location, use þaðan sem (from where). It often describes a starting point, an origin, or a vantage point.

I want to see the country from where the migratory bird comes.
Mig langar að sjá landið þaðan sem farfuglinn kemur.
The migratory birds come from Africa, from where they fly in the spring.
Farfuglarnir koma frá Afríku, þaðan sem þeir fljúga á vorin.
The chicks look down from the nest, from where they see the forest.
Ungarnir horfa niður úr hreiðrinu, þaðan sem þeir sjá skóginn.

Distant Places

These directional clauses are especially useful for describing long journeys, such as flights between the tropics (hitabeltið) and a bird's breeding grounds.

Africa is a distant place from where the migratory bird comes.
Afríka er fjarlægur staður þaðan sem farfuglinn kemur.
The tropics are a distant place to where the migratory bird flies.
Hitabeltið er fjarlægur staður þangað sem farfuglinn flýgur.