The problem with this is that not only do they create unsightly mounds, but they will prohibit the growth of any vegetation at that spot. So grab a trowel or shovel and container and spend five minutes scooping them up. Throw them out in the trash. Fresh bark mulch can be spread in the area. These well-known and widely distributed thrushes are a common sight throughout North America, as they return to breeding grounds from wintering areas.
Robins are the largest of our thrushes.
In addition to Robins, look in woodlands and thickets for other migrating thrushes such as Wood, Hermit, and Swainson's Thrushes, and Veerys. Read your field guide ahead of time so you will know their ID clues and sometimes subtle differences. All rights reserved worldwide.