418 BULLETIN OF THE 



to the Turdidce, and two each to the Icteridce, Picidce, Cucididce, and 

 Tetraonidce ; several other families have one representative each. The 

 total absence of any species of Falconida, Strigidee, Herodiones, Gralla, 

 and Natatores is one of the most striking features in the list of the 

 species restricted to the Eastern Province. 



Twelve of the Eastern Province species breed throughout the greater 

 part of the province, three of which are Sylvicolidce, two are Picidce, 

 one is a humming-bird, one a wader, and one a tern. 



Forty-one of the one hundred and twenty species restricted in longi- 

 tudinal range to the Eastern Province extend so far into the Tropical 

 American Realm in the breeding season as to be essentially tropical 

 species, exclusive of a considerable number that appear only in the 

 Floridian Fauna. Twenty-one of these are land birds and twenty 

 aquatic ; the latter embracing six Herodiones, six Grallce, and eight 

 Natatores, five of which are terns. The land species embrace three 

 hawks, two species of Fringillidce, seven of Sylvicolidce, two of Picidce, 

 and one each of seven other families. 



General Remarks on the Distribution and Migration of the 

 Birds of the Eastern Province. 



The preceding tables, illustrative of the geographical distribution of 

 the birds of the Eastern Province of the North American Temperate 

 Region, and the summary remarks already given respecting them, 

 indicate a number of interesting general facts. 



I. The species which have the greatest longitudinal range in the 

 breeding season are the hawks, owls, and vultures, the swallows, the 

 Turdince or typical thrushes, the woodpeckers and flycatchers, and the 

 water birds ; among the latter, especially the Scolopacidce, the C/iara- 

 driidce and their allies, the Anatidoe, and the Laridce ; in fact, nearly 

 all the Natatores. All the land birds ranging widely in longitude are 

 hence species which possess highly developed powers of flight, and have 

 also a wide latitudinal range. The few circumboreal Natatores, which 

 have only moderate or greatly reduced powers of flight, possess great 

 power of locomotion in the water. Their habitat is, moreover, not 

 only generally the sea-shores, but the boreal shores of the converging 

 continents of the northern hemisphere. Hence all the species having 

 a wide geographical range — as the circumpolar and continental — are 

 either pre-eminently strong fliers or powerful swimmers. It also ex- 



