We organize a guided tour to Mud Lake in Ottawa for observation of migratory birds. Mud Lake is a part of the Britannia Conservation Area. This place is a real paradise for birds and birdwatchers. August is a time when many migrant birds fly back from their breeding grounds in the Canadian landscapes to southern areas. At this time you can see many interesting bird species hidden in the crowns of trees, in high bushes or shrub tickets, as well as found in numerous bays of the lake itself in different seasons of the year. At Mud Lake, you can observe not only breeding birds but also many migratory species, the number of which increases incredibly in late spring – and late summer. August is just such a period. At this time, the migratory flows of many songbirds can be observed in the river valleys along their migratory flyways. A significant number of autumn migrants can be spotted at stopover places like Mud Lake. Many of them are very young birds that have only recently left their nests and for the first time fly to distant wintering sites on a long journey together with their parents. Many species, especially small passerine birds, are difficult to identify during this period because many of them change their bright breeding plumage to more modest outfits. However, some waterfowl – such as wood ducks, American wigeons, mallards, and others – already demonstrate the new bright plumages.