Which of the following are the three most common pest birds?

The three most common pest birds are typically recognized as pigeons, starlings, and sparrows due to their prevalence in urban areas and their propensity to cause issues for buildings and public health.

Pigeons are often found in large numbers in cities, where they can create unsanitary conditions with their droppings, which are not only messy but can also pose health risks. Additionally, their nesting habits can lead to damage to structures.

Starlings are known for their ability to thrive in various environments, and their large flocks can cause significant problems, especially in agricultural situations where they might feed on crops.

Sparrows, while generally smaller, are equally problematic in urban settings due to their adaptability and tendency to establish large populations that can create nuisances around homes and businesses.

The other options contain birds that, while they may be common in certain regions, do not typically fall into the category of "pest birds" that's relevant for pest management in urban settings. Finches and cardinals are generally considered more desirable birds, while canaries and the term 'HTML' seem unrelated or incorrect in the context of bird species. Thus, the selection of pigeons, starlings, and sparrows accurately reflects the birds most often