descending order are the: blackbird, chaffinch, house sparrow, great tit, blackcap, starling, robin, chiffchaff, greenfinch, and blue tit. Waterfowl In spring, the Lake Constance is an important breeding ground, especially for the coot and great crested grebe. Typical waterfowl include the: shoveler, goldeneye, goosander, pochard, grey heron, pintail, tufted duck and mallard. In December 2014, 1,389 cormorant were counted. The International Lake Constance Fishery Association (IBF) estimates the food requirements of the cormorants on Lake Constance at 150 tonnes of fish annually. Overwintering Lake Constance is an important overwintering area for around 250,000 birds. annually. Bird species such as the dunlin, the curlew and the lapwing overwinter at Lake Constance. In the middle of December 2014 there were 56,798 heron, 51,713 coot and 43,938 pochard. In November/December are about 10,000 to 15,000 red-crested pochard and 10,000 great crested grebe on Lake Constance. Migration During migration in late autumn there are also numerous loons on the lake (black-throated and red-throated loon, as well as a few great northern loons). Lake Constance is also very important as a staging post during the bird migration. Bird migration is often inconspicuous and most noticeable when there are special weather conditions that make day migration obvious. Only where there is a prolonged spell of widespread low-pressure is it common to observe the congestion of large groups of migratory birds. This can often be observed in autumn on the Eriskircher Ried on the northern shore of Lake Constance. This is where broad front migration converges on the lake and birds then try to move along the shore towards the northwest. The importance of Lake Constance as an important area for resting and overwintering is underlined by the Max Planck Institute for Ornithology's Radolfzell Bird Observatory (Vogelwarte Radolfzell), which is the bird ringing centre for the German states of Bavaria, Baden-Württemberg, Berlin, Rhineland-Palatinate and the Saarland as well as for Austria, and which researches bird migration. Fish Around 45 species of fish live in Lake Constance. The annual haul from fishing is 1.5 million kg. Unusual species occurring here considering the location of the lake are the whitefish (Coregonus spec.) and the Arctic char (Salvelinus alpinus). Fish that are important for the fishing industry are: Bodenseefelchen (German: also Blaufelchen, Lat.: Coregonus wartmanni) Sandfelchen (German: also Weißfelchen, Lat.: Coregonus arenicolus) Gangfisch (Lat.: Coregonus macrophthalmus) Lake Constance whitefish (German: Kilch, Lat.: Coregonus gutturosus) Grayling (German: Äsche, Lat.: Thymallus thymallus)