The headline of the article, as is often the case, overstates what the actual research shows. Here is the actual claim made in the abstract of the paper:

"We show that single-neuron responses in the pallial endbrain of crows performing a visual detection task correlate with the birds’ perception about stimulus presence or absence and argue that this is an empirical marker of avian consciousness."

In other words: when crows who are trained to look for something show behavioral evidence that they see what they are looking for, the researchers can correlate that with neuron firings in their brains. Which, compared to the overblown claim of "higher intelligence", equates to "whoop de freaking do".