Never cross a crow - it will remember your face...
Crows can remember human faces associated with stressful situations for up to five years and they’ll also warn their friends.
Crows are known for their extraordinary smarts and have been observed making tools to dig food out of tight spots.
Now a five-year study by scientists at the University of Washington has found they possess an unusually good memory for human faces linked to a stressful event.
The researchers donned a caveman mask before trapping, banding and releasing wild crows at five sites on or near their campus in Seattle, Washington.
They then observed how the crows reacted when approached by someone wearing the caveman mask and compared it to the reaction prompted by a control mask – in this case, a mask depicting the face of former U.S. vice president Dick Cheney.
While the Cheney mask drew a muted response, the caveman mask prompted rounds of angry squawking and flapping, not only from the birds previously captured but also from crows that had witnessed the initial trapping.
At one of the five sites, 20% of crows reacted angrily to the caveman face shortly after the trapping. After five years, the proportion of crows reacting to the caveman face was recorded at 60%, suggesting that word had spread among the flock that this was a dangerous face.
" Taco mac and cheese has seasoned ground beef and gooey cheese sauce over tender pasta. Make this Mexican-inspired recipe for taco night!"
- 16-ounces elbow macaroni noodles
- 1 pound ground beef
- 1-ounce taco seasoning
- 1 (10-ounce) can of Rotel diced tomatoes & green chilies, drained well
- 4 tablespoons unsalted butter
- 1 teaspoon garlic powder
- 1 teaspoon onion powder
- 1/4 cup all-purpose flour
- 4 cups half and half
- 4 cups shredded Monterey Jack cheese, divided
- 2 cups shredded sharp cheddar cheese, divided
- Taco Toppings such as tortilla strips, diced tomatoes, diced avocado, sour cream, chopped cilantro, sliced jalapenos
- Preheat the oven to 400°F. Grease a 9x13 inch baking dish with cooking spray and set aside. Cook the noodles per the directions on the back of the box and drain well, set aside.
- In a heavy bottom skillet over medium-high heat brown the ground beef. Drain any excess fat or water off of the beef and add the taco seasoning and Rotel, stir it in well, cook an additional 2 minutes, and set aside.
- In a heavy bottom skillet over medium-low heat, add the butter and melt. Add the garlic powder, onion powder, and flour to the pan and whisk to mix into the butter. Cook for two minutes, stirring occasionally.
- Slowly add the half and half to the pan whisking constantly to avoid lumps. Bring to a simmer to thicken. Take off the heat and add 3 cups of the Monterey Jack cheese and 1 cup of the sharp cheddar cheese, whisk to combine and melt the cheese into the sauce.
- Mix the cheese sauce with the noodles and the ground beef mixture, pour everything into the baking dish. Smooth out the top so it cooks evenly.
- Add the remaining cheeses on top of the casserole. Bake 15-20 minutes until golden brown and bubbly. Serve with your favorite taco toppings!
1926 – Jeffrey Hunter, American actor (d. 1969)