2. Notes on Birds from Easter Island. 



By 

 EINAR LONNBERG. 



The Swedish Expedition stayed only a short time (^^/e — Vt 1917) on this 

 island, and a visit to a small islet near the southwestern promontory, Motu 

 Nui, could not be extended to more than a couple of hours in consequence of 

 bad weather and storm. A few other rocks on which birds nested could not 

 be visited at all. A complete investigation of the bird life was therefore im- 

 possible. 



F. FUENTES (Contr. al Est. de la Fauna de la Isla de Pascua, Bolet. del 

 Mus. Nac. de Chile, 1914) published a list of the birds known to him. Besides 

 introduced species, it includes three birds, Gigis alba Licht. {= Gygis alba 

 royana), Anous caeruleus Gould (= Procelsterna) and A. stolidus var. pileata 

 Scop, (probably = unicolor), 



Mr. BaCKSTROM collected, however, material of the species enumerated 

 below. The natives told him that 12 different kinds of birds live on the island. 

 Specimens of the following were secured: 



Sterna lunata 



Gygis alba royana 



Procelsterna caerulea skottsbergii 



Anous stolidus unicolor 



Pterodroma heraldica paschae 



Sula cyanops 



Two more kinds were seen, one of which was a Phaeton (also observed 

 by Mr. FuENTES) to judge from the »two long tail-feathers». 



Two kinds of birds have been introduced from Chile, viz. Leistes supra- 

 ciliaris Bp., which is rare, and Notoproda perdicaria Kittl., which is common 

 (fide K. B.). 



Sterna lunata Peale 



Motu Nui: 2 J^J*, i ?, '% I9i7- 



Length of wing in males 283 and 272 mm., in the female 274 mm. Length 

 of culmen 42 — 43,5 mm. 



