Cattle sometimes congregate in cold weather around a burning coal seam and enjoy the warmth.
They are seldom found in large numbers at any great distance from the sea, and usually congregate in the principal towns and commercial centres, such as Adrianople, Constantza, Varna and Philippopolis; there are also detached colonies at Melnik, Stanimaka, Kavakly, Niegush and elsewhere.
The Armenians, like the Greeks, congregate in the principal centres of trade, especially at Constantinople; their numbers were greatly reduced by the massacres of 1896.
(solar) stars show no tendency to congregate in the galactic plane.
However, congregate towards the galactic plane.
Many of the gulls congregate in vast numbers to breed, whether on rocky cliffs of the sea-coast or on healthy islands in inland waters.
While they are in salt water they live singly or in very small companies, but during May (the twaite shad some weeks later) they congregate, and in great numbers ascend large rivers, such as the Severn (and formerly the Thames), the Seine, the Rhine, the Nile, &c., in order to deposit their spawn.
They usually congregate in the larger towns, though in northern Moldavia there are a few purely Jewish villages, recalling those of Poland.