Pest Library – Pest Birds – Crow

Facts: Crows

Appearance: The common crow native to New Jersey is a large, black bird measuring 16 to 20 inches in length with a relatively short bill for its body size. Its coloring is completely black from bill to claws, with a slightly purple or greenish-blue gloss on its body and wings. A crow’s eye color actually changes over time with the young having blue eyes and adults having black eyes.

Habit: Crows are known for their increased level of intelligence, making them very difficult to control or remove. They are highly social birds that are in constant communication with the rest of their flock. Crows in our area often migrate south during the winter months depending on weather conditions. Crows in areas further south do not need to migrate.

Health/Damage Concerns: A variety of health and damages concerns get raised when dealing with crows. The uric acid in their droppings poses not only a health risk, but also poses the risk of damage to buildings, roofs and siding. This type of damage adds up over time and costs millions of dollars a year in repairs around the country. Crows can also be aggressive in protecting their nesting areas causing concern for people that need to travel nearby. They are also an agricultural nuisance since they are notorious for attacking crops, especially corn.

Diet: Scavenger diet; will eat anything from freshly planted crops to small animals (snakes, mice, ect.) and carrion. They are also known to eat a variety of insects, making them a federally protected bird.

Reproduction: Female crows with often have one to two broods per year with four to seven eggs in each brood. It only takes about two months for young to go from egg to young bird ready to leave the nest.


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