This is the 12914th most frequent Polish word.
obserwowane
"Obserwowane" means "observed" or "being watched" in English.
Here, 'obserwowane' is used as an adjective describing 'birds', indicating that these birds were being observed.
Obserwowane ptaki były rzadkimi gatunkami.
The observed birds were rare species.
In this sentence, 'obserwowane' modifies 'data' and conveys that the data were noted or tracked during the experiment.
Dane obserwowane w eksperymencie potwierdziły hipotezę.
The data observed in the experiment confirmed the hypothesis.
Here, 'obserwowane' describes 'reactions' implying that these reactions were noted or monitored.