Question: how do we know that "animals" is plural in this sentence? Both blå and dyr stay the same between singular and plural
The "de" lets you know that "dyr" is plural. If it were the singular "animal", the sentence would be "Vi kigger på det blå dyr."
I have trouble hearing the difference between "de" and "det" when I'm listening to DuoLingo. It's especially tough here because nothing else in the sentence changes to give a clue between singular and plural.
It does, but it is very difficult to hear the difference! Danish is a minefield of unpronounced consonants!
Would that also mean "We look after the blue animals" as in we watch over them?