The intelligence of some birds is pretty well accepted. Some even use tools (sticks to dislodge food items). There is nothing wrong with formulating a hypothesis, (e.g. bigfoot roams the woods), but if solid evidence does not come to light over decades (e.g. convincing video), then it is very unlikely (but not impossible). I think the problem is not the general dismissal of animals being intelligent, but rather the general overestimation of human intelligence. Only been a professional scientist for 35 years, so I'm still learning:) No offense meant, but humans see what they want to see. That is why double-blind placebo tests are used in critical experiments.
