Which of the following is a common type of bird encountered by pest professionals?

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Pigeons are commonly encountered by pest professionals primarily due to their adaptability to urban environments and their propensity for nesting in human-made structures. Their presence in cities can lead to issues such as property damage, unsanitary conditions from droppings, and public health concerns.

In contrast, while cardinals, robins, and blue jays are all frequently seen in various environments, they are generally not associated with the same level of pest-related problems as pigeons. Cardinals and robins tend to avoid human activity and urban areas more than pigeons, while blue jays, although they can be abundant in some areas, do not exhibit the same behaviors that would classify them as pests in urban settings. The unique characteristics of pigeons in terms of their nesting habits and interaction with people make them a primary concern for pest management professionals.