1^8 Royal Australasian Ornitholosists' Union; [isflan 



3S. White-faced Terniet. Sternula nereis (5. n. horni). — Resident. 

 Abundant on the coast and on the Swan River. Breeds on sandy 

 beaches on the mainland and islands. 



39. Sooty Tern. Onychoprion fuliginosa (O. fuscata serrata). — 

 (Occasional visitor. One was captured on the Swan River in Decem- 

 ber. 1917. This is at present the only record for the district. 



40. Bridled Tern. Onychoprion ancestheta {Melanosterna ancethetiis 

 }iovcBhollandi(F). — Resident. Breeds on islets off Rottnest, Carnac, 

 and Garden Islands, and in Safety Bay. The single egg is laid in a 

 crevice in the limestone rocks. Possibly the species is only a summer 

 visitor, as I do not know of any observation as to its occurrence in 

 winter. Even during the summer it seems always to go out to sea 

 to procure its food, and is never observed on the coast or in Cockburn 

 Sound . 



41. Silver Gull. Lanis novce-lwllandice {Bnicliigavia n. longirostrisj. 

 — Resident. Plentiful on the coast and on the Swan River. Nests 

 on the cliffs at Rottnest and Garden Islands and on many of the 

 smaller islets and rocks. 



42. Pacific Gull. Gabiamts pacificns (G. p. georgii). — Resident. 

 A few birds may generally be seen about the coast. They probably 

 nest in the district, though there is no definite record of the occurrence. 



43. Southern Skua. Megalestris antarctica {Catharacta I. lonnhergi). 

 — -Winter visitor. Usually to be seen in Cockburn Sound during the 

 winter. 



44. Turnstone. Strepsilas inierpres (Arenaria i. oaJmensis). — 

 Summer visitor. Occurs on the shores of Rottnest and Garden Islands 

 during the summer, but is not plentiful. 



45. Pied Oyster-catcher, Hcematopus longirostris {H. ostralegus 

 lougirostris). — Resident. A few are to be seen on sandy beaches, 

 and ]\Iilligan records them as occurring on Lake Yanchep. 



46. Black Oyster-catcher. Hcematopiis fuligifiosus {H. niger bernieri). 

 — Resident. A few on rocky parts of the coast, especially Rottnest 

 Island. 



47. Red-kneed Dottrel. Erythrogonys . cindus {E. c. cincius). — 

 Winter visitor. Large numbers are often to be seen about the 

 swamps and in samphire flats on the Swan River in winter, usually 

 in company with the Black-fronted Dottrel. 



48. Black-breasted Plover. Zonifer pectoralis (Z. fricolor gwoi- 

 dolena). — Resident. This species does not occur in the immediate 

 neighbourhood of Perth, but has recently become common on cleared 

 land at the foot of the hills about Gingin, and also occurs near 

 Pinjarrah. 



49. Golden Plover. Charadrius fiilvus {Pluvialis dominiciis fitlvus). 

 — Summer visitor. Plocks occur on Rottnest and probably on other 

 parts of the coast. 



50. Red-capped Dottrel. .Egialitis ruficapilla {Leucopolius r. rufi- 

 capillns^. — Resident. Very plentiful on all the sandy parts of the 

 coast, breeding on the sand-liills. Occasionally met with about the 

 swamps. 



51. Hooded Dottrel. /Egialitis nwnacha {Charadrius cucullatus 

 tregellasi). — Resident. Much less common than the preceding. 



