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_ PERIODICAL PHZNOMENA OF ANIMALS AND VEGETABLES. 335 
Rare, or only occasional, Summer migrants *. 
Emberiza hortulana (Ortolan Bunting). Oriolus galbula (Golden Oriole), 
Lanius rufus (Woodchat Shrike). Sylvia tithys (Black Redstart). 
Motacilla flava, Temm. (Gray-headed Wagtail). Upupa epops (Hoopoet). 
Muscicapa luctuosa, Temm. (Pied Flycatcher). 
Regular Winter migrants. 
Anser segetum (Bean Goose). Fringilla spinus (Siskin). 
Corvus cornix (Hooded Crow). Scolopax rusticola (Woodcock), 
Cygnus ferus (Hooper or Wild Swan). Turdus pilaris (Meldfare). 
Fringilla montifringilla (Mountain Finch), ' 
Occasional Winter migrant. 
Bombycilla garrula (Bohemian Waxwing). 
Of accidental occurrence. 
Procellaria leachii (Fork-tailed Petrelt). Procellaria pelagica (Stormy Petrelt). 
Species to be observed for the periods of departure §. 
Cypselus apus (Swift). Hirundo rustica (Swallow ||). 
Hirundo riparia (Bank Martin). —— urbica (House Martin ||). 
Species to. be observed for the periods of collecting into flocks and pairing 
off in the Spring. 
Fringilla cannabina (Common Linnet). Sturnus vulgaris (Starling), 
Species to be observed for the periods of commencing song or note, 
Columba palumbus (Ring-dove). Parus major (Great Titmouse), 
Emberiza citrinella ( Yellow-hammer). Turdus merula (Blackbird). 
Fringilla cannabina (Linnet). —— musicus (Thrush). 
— chloris (Greenjinch). — visciyorus (Missel-thrush). 
— celebs (Chafiinch). 
Species to be observed for the periods of building. 
Corvus frugilegus (Rook). Fringilla domestica (House Sparrow), 
— pica (Magpie). 
* It was thought desirable to make a separate list of these species, all of which are in- 
cluded amongst the regular migrating birds selected for observation in M. Quetelet’s ori- 
ginal list, but which in this country are either very local, or of only accidental occurrence. 
halle, or whenever observers haye an opportunity of noticing them, the dates should be 
preserved. 
+ This species generally occurs in this country in the autumn, or at least not till after the 
breeding-season. 
+ Both these species are particularly inserted in M. Quetelet’s list, it being thought that 
their occasional appearance inland is generally more or less connected with tempestuous 
weather. Their occurrence, however, would not seem to be confined to any particular 
season. 
__§ It would be desirable to note, wherever it can be done, the exact period of departure 
of any of the species in the foregoing lists of summer and winter migrants; but as it is in 
‘general difficult to determine this, it is only especially recommended in the case of the 
Swallow tribe. t 
|| In the case of these species it will be well to notice the period at which the great bulk 
take their departure, as well as the date of the last individual’s being seen. It will also be 
proper to notice the exact time of swallows and martins congregating, which takes place for 
a longer or shorter period before they depart. 
