The article speaks of experiments designed to distinguish between "human-like insight" and "careful observation." It turns out that crows are not so much "doing science" but rather they are keen observers of the world around them. In some circumstances they can use their observational skills to notice that something they have done gets them closer to their goal. This is what is at work when crows find a way to get at a tasty bit of meat hung on a string below them and out of reach.
It is also at work when crows find a way to raise the water level in a tube so that the treat floating on top is accessible. This looks like real thinking; but scientific experiments suggest that it is just plain observation and repetition. The crows just pay attention.
Regardless of what it is that is going on in the brain and actions of crows on seawalls or in the labs of scientists, the results are fascinating. The article goes on to speak of relatively complex tool construction and tool use that has been observed in crows. Next to humans, New Caledonian Crows may be the greatest tool makers and tool users on the planet. They are better at tool use than chimpanzees who, in some cases, cannot multi-task well enough to concentrate both on the skills needed to work the tool and the ultimate task toward which the tool is applied.
This article and other recent science on animal behaviour does make me wonder how many things separate humans and animals on the planet: tool usage, abstract thought, language, moral judgement, responsibility. How many of these might be the true elements of the imago dei found in humans?