I\'(>\'<(1 .luxtid/asidii (hiii//io/<)!'is/s' Vniou. 



157 



j^. White-headed Petrel. (Eslrclala lessoni [^/lislniata lessonii 

 h'licoccl^Iia.la . — Occasional winlcr xisitor. A single specimen louncl 

 dead on the beach at Collesloe in .\ui;iisl, k^i;, is the only recoiil lor 

 the district {Emu. x\-., p. jc>rv. 



27. Soft-plumaged Petrel. (Estrelaia mollis [Eterodroma mollis;. — 

 Occasional winter visitor. A single s])ecimen lound dead on the 

 beach at Cotlesloe is the only_ record lor the district. 



jS. Giant Petrel. Ossifraga gigantea {Macronectes g. albus :. — Winter 

 \isilor. hfccpientlv. obtained on the coast in the winter, and is 

 evidently a regular visitor. It has even been suggested that it breeds 

 on the islands, but this is certainly not the case. I do not know of 

 any white specimen obtained in Western Australia. 



2u. Broad-billed Dove-Petrel, Prion vittatus {Pachy/^tila v. missa). 

 — Winter visitor. Judging by the numbers sometimes washed up 

 on the Ijcacli alter a storm, lliis species is frequent off the coast in 

 winter. 



V>- Dove-Petrel. Prion Imnksi or /'. turtiir \Hctero/7rioii desolatiis 

 or //. helClieri). — Winter visitor. Often washed up in considerable 

 numbers on tlie beach. Mr. J. B. Higham informs me that he has 

 seen Prions of some species flying over the water in Fremantle Harbour. 



^1. Wandering Albatross. Diomedea exulans {D. e. chiouoplera). — ■ 

 Winter \-isitor. This species is probably not uncommon in winter 

 some distance out from the shore-line, but owing to its powers of 

 flight it rarely falls a victim to storms like the other members of the 

 Petrel family ; hence it has only once been actually obtained in the 

 district. 



3-:. Grey-headed Molly ma wk. Diomedea culminata {Thalassogeron 

 chrysostoma cnlminatusj. — Occasional winter visitor. A specimen 

 captured alive near Cottesloe in June, 191 7, is the sole record {Emu, 

 xix., p. 50 . The statement that it was picked up at Fremantle, 

 which I made in that j^ilace, is, I regret to say, incorrect. 



33. Yellow-nosed Mollymawk. Diomedea chlovorhyucliiis and I), 

 carteri {Nealbatrus chlororhynchus carieri). — Winter visitor. Frequent 

 off the coast in winter and often washed up dead on the beach. 



34. White-tailed Black Tern. Hydrochelidon leucoptera {H . I. griseaj. 

 — Irregular visitor. A great irruption of this species occurred in 

 April, 1917 {Emu. xvii., p. 95), when they were to be seen on the 

 Swan River, on all the swamps, and on the shores of Garden Island. 

 A few apparently appeared on the Swan River in the following year 

 (Emu, xviii., p. 134). 



35. Marsh Tern. Hydrochelidon fluviatilis {H. leucopareia rogersi). 

 — Irregular visitor. Parties sometimes visit the swamps, where they 

 may remain for some time, but there is no evidence that the species 

 breeds in the district. 



36. Caspian Tern. Sylochelidon caspia {Hydroprogne tschegrava 

 strenua). — Resident. A few^ pairs may usually be seen on the coast, 

 and they doubtless breed either on the beach or on some of the islets, 

 Ihougli 1 know oi no definite record ol their nesting in the district. 



2,7- Crested Tern. Sterna cristata {T/ialassetis hergii givendolenc?). — 

 Resident. Common on the coast and on the Sw\in River. Breeds 

 on islets off Rottnest Island and in Safety Bay. 



