This is the 4629th most frequent French word.
observés
"Observed."
In this sentence, 'observés' is used as a past participle indicating that the birds were the objects of observation in the past.
Les oiseaux furent observés dans leur habitat naturel.
The birds were observed in their natural habitat.
Here, 'observés' is a past participle that follows the auxiliary verb 'avons', referring to the action we took to study the stars.
Nous avons observés les étoiles avec un télescope.
We observed the stars with a telescope.
The term 'observés' functions as a past participle within a passive voice construction, denoting that the changes were identified or recorded post-experiment.