Look up mysterious or mysteriousness in Wiktionary, the free dictionary. Studies suggest that birds have a natural instinct to dive in front of moving cars in order to avoid predators and find food. This instinctivebehavior is further reinforced by environmental factors such as habitat destruction, overcrowding, and food scarcity. Why Birds Instinctively Freak Us Out. Birds may seem harmless, but theirsudden movements, harsh sounds, and unpredictable behavior tap into deep-rooted instincts. Perceived Threats and Fear. Birds, by nature, are prey animals, and theirinstinct is to react defensively when they feel vulnerable. This defense mechanism can manifest as aggression. Explore the emotional significance behind the sudden appearance of birds. This video dives into thereasons and feelings connected to these avian mysteries, inspired by the question, 'why do birdssuddenly appear.' They have a healthy curiosity about each other than they go about their own way. Just wondering about any input you might have other than ignoring his strikes. I don’t know how to “punish” the behavior. He does say “Ouch” occasionally. When they suddenly appear near windows, the behavior is usually connected to territorial awareness, food opportunities, seasonal instincts, or environmental reflections that trigger natural responses.