394 Mr. W. C. Tait on the Birds of Portugal. 



249. Sterna minuta, Linn. " Chureta/^ Vianna do Cas- 

 tello ; " Chilreta/' Oporto ; " Grazina/' Aveiro ; " Garajau/' 

 Faro ; '' Cliarrano/^ Tavira. 



I have seen the Little Tern from May till the end of 

 August. Many nest on the sand-dunes of the Costa de S. 

 Jacintho at the entrance to Aveiro, where I have taken their 

 eggs ; also at the entrance to Faro harbour. 



250. Sterna ANGLicA, Mont. '' Chagaz/' Ovar ; " Tagaz/' 

 Aveiro. 



The Gull-billed Tern nests on the sand-dunes between the 

 Aveiro lagoon and the sea near Torreira, whence I have 

 received eggs and bird. 1 saw numbers flying about near 

 Aveiro bar in the beginning of June. 



251. Sterna cantiaca, Gmel. " Garajau/' Oporto, AU 

 garve; " Garau," Esmoriz ; " Gaivina," Peniche ; '' Garao/' 

 River Tagus; "^ Gavito," Quarteira. 



The Sandwich Tern passes on migration in August and 

 September, but some winter here and move north again iu 

 April. I have seen them in May, and on the 3rd of June, 

 1884, I shot one at Quarteira in the Algarve. 



252. Hydrochelidon hybrida (Pall.). 



I have seen the Whiskered Tern in spring several times 

 near Avintes on the river Douro, about two miles above 

 Oporto, and it is almost sure to breed in the marshes of this 

 country. I did not meet with it in summer on the marshes 

 edging the Ovar-Aveiro lagoon. In the Coimbra Museum 

 there are specimens obtained during the summer months. 



253. Hydrochelidon nigra (Linn.). 



The Black Tern has been seen by me during the months 

 of May, August, and September. It is probable that this 

 species will be found to nest in Portugal, as is the case in 

 Spain. 



254. Larus RiDiBUNDUS, Linn. "Gagosa,'' Aveiro ; "Cha- 

 palheta," Eiver Guadiana. 



The Brown-headed Gull is abundant, arriAang on migration 

 towards the end of October or beginning of November, by 



