I've seen both crows and ravens plenty of times, and trust me they are not the same bird. The Japanese share superstitions with other Asian cultures, particularly the Chinese, with whom they share significant historical and cultural ties.The unluckiness of the number four is one such example, as the Japanese word for "four" sounds like the word for "death". Many of these robots – Ugo, Telenoid and others – … There are about 40 species of crow, according to PBS, so there are many different sizes of crows. We all know that crows are smarter than the average bird, but will 007 be able to solve the complex puzzle and retrieve his reward? My wife thinks Japan has crows, not ravens, but she isn't sure. Some superstitions that are common in Japan have been imported from other cultures. Many bird species are incredibly smart. “Japan is quite domestic-oriented, and we don’t accept many immigrants, so robots are more suitable." In fact, according to Google Analytics, “crows, ottawa” is the sixth most common google search that brings people here. Don’t get close to them. I’ve mentioned crows on my blog a few times, so now I get a lot of people coming here in search of information about the massive crow congregations in Ottawa. So next time you come across one of these big black birds in Japan, you might want to keep a firm grip on your belongings. And on a university campus in Japan, crows are known to intentionally leave walnuts in a crosswalk and let passing traffic do their nut cracking. Ravens are more than twice the size of crows, and have a wingspan of more than a meter. And if you’re a panda, you’d better watch your back, because panda fur is a hot commodity in the world of crows . They typically attack from behind, so maybe use a hat or umbrella to cover your head or walk along a wall or building for protection. She says they're definitely not as large as Alaska's ravens. (Four feet or so.) Overview. The American crow measures around 17.5 inches (45 centimeters). According to Japan’s Environmental Ministry, when the crows caw short and sharply, like “guatt, guatt,” drops a branch, or shows you their poking at power line, they sure are angry.