8 CATALOGUE OF BIRDS. 



WREN. 



Case 9. 



It is needless to say much about this famihar httle 

 bird. Jenny Wren is ahnost as well known as Cock 

 Robin. 



It may possibly, however, have escaped the notice 

 of some observers, that these little birds have a singu- 

 lar habit of roosting together in great numbers during 

 cold weather. 



I have repeatedly counted as many as ten or a 

 dozen, just at dusk, flying one after another into a 

 hole in a haystack, or in the thatch of some out- 

 building. 



The specimens in the case were obtained at Port- 

 slade, near Brighton, in June, 1874. 



SAND MARTIN.— (Mature.) 



Case 10. 



We frequently have severe weather in the spring after 

 the arrival of this poor little traveller. 



The Sand Martin, however, appears to be a remark- 

 ably hardy bird, as I have sometimes noticed thousands 

 huddled together on the reeds in the broads of our 

 eastern counties during a snow- storm early in the 

 spring, and apparently none the worse, should the sun 

 break through on the following day. 



When I lived in Glenlyon, in Perthshire I was sur- 

 prised to notice one season that no Sand Martins 

 nested in the banks of an island in the Lyon, where I 

 had observed them the previous year. We were, how- 



