Harrier (bird) Harrier (bird) A harrier is any of the several species of diurnal hawks sometimes placed in the Circinae sub-family of the Accipitridae family of birds of prey. Harriers characteristically hunt by flying low over open ground, feeding on small mammals, reptiles, or birds. The young of the species are sometimes referred to as ring-tail harriers. They are distinctive with long wings, a long narrow tail, the slow and low flight over grasslands and skull peculiarities. The harriers are thought to have diversified with the expansion of grasslands and the emergence of C4 grasses about 6 to 8 million years ago
Twitter bot Twitter account is controlled by a bot. In a 2012 paper, Chu et al. propose the following criteria that indicate that an account may be a bot (they were designing an automated system): Research shows that humans can view Twitter bots as a credible source of information. There are many different types of Twitter bots and their purposes vary from one to another. Some bots may tweet helpful material such as @EarthquakesSF (description below). In total, Twitter bots are estimated to create approximately 24% of tweets that are on Twitter. Here are examples of some of the Twitter bots and