ON THE MIGRATION OF BIRDS. 38 < 



(the Heron excepted) being on the ground, and ex- 

 posed to every one : as rural oeconomy increased 

 in this country, these animals were more and more 

 disturbed; at length, by a series of alarms, they 

 were necessitated to seek, during the summer, 

 some lonely safe habitation. On the contrary, 

 those that build or lay in the almost inaccessible 

 rocks which impend over the British seas, breed 

 there still in vast numbers, having little to fear 

 from the approach of mankind: the only dis- 

 turbance they meet with in general, being from ; 

 the desperate attempts of some few to get their 



CLOVEN FOOTED WATER BIRDS. 



[The Spoonbill hd.s been seen in yorfolk, in Spooneill. 

 April; and in Devonshire, in the winter months.] 



The White Heron is an uncommon bird, and Herons. 

 visits us at uncertain seasons ; the common kind 

 and the Bittern never leave us. 



[The Glossy Ibis, the only species which has Ibis, 

 visited England, was seen in Anglesey, and on 

 the banks of the Thames, in the month of Sep- 

 tember.^ 



The Curlew breeds sometimes on our moun- Curlews. 

 tains; but, considering the vast flights which . 

 appear in winter, ^^e imagine that the greater 



p p C) 



M ^ M 



