find vs find out
A new study surveyed hundreds of bird species in the USA and Canada and found that nearly a third of birds disappeared from most biomes since 1970.
A study surveyed hundreds of types of birds in the USA and Canada. It found out that nearly a third of birds died from most biomes since 1970.
Please, compare two sentences. They use "found" in the first and "find out" in the second. Can we use only 'found' in both? Can we use only 'found out' in both?