Observations on Periodieal Birds. 129 
Ath. Birds that’ are partially periodical, 
retiring in particular districts only. 
The tables contain those species of perio- 
dical birds that T have observed in the neigh- 
bourhood of Manchester, classed according 
to the above method; with the periods at 
which most of them appear and disappear, 
taken at a mean of eight years’ observations, 
commencing with 1814, and terminating with 
1821. 
TABLE [. 
Periodical Summer Birds. 
Birds. Appear. | Disappear 
Hirundo riparia ........-.{Aprii 6 Sept. 16 
| L Sand Martin 
2 Wryneck——Yunx torquilla.............. do. 
3 Willow Wren Motacilla trochilus ....-} do, 12] do. 12 
4 Redstart—— Motacilla phenicurus.......... do. 13! do. 5 
5 Wheat-ear Motacilla enanthe ........ do. 14] do. 13 
6 Swallow Hirundorustica........ eeeeeel do. 18 {Oct, 11 
7 Whinchat Motacilla rubetra............ do. 20 |Sept.17 
8 Black-cap——Motacilla atricapilla ........{ do. 22] do. 
9 Martin ——Hirundo urbica...........-.-.- do. 23 |Oct. 13 
10 Cuckoo Cuculus canorus....... segecnsac do. 24 {June 28 
Ll Yellow Willow Wren Motacilla sylvicola} do. 28 Sept. 10 
12 Stonechat——Motacilla rubicola ....... .. do, do. 
13 Sandpiper—— Tringa hypoleueos .......... do. 29] do. 19 
14 Grasslropper Warbler-——Motacilla locustella] do. 30 
15 White-throat. Motacilla sylvia. .-....... May 2 | do. 17 
16 Swift——Hirundo apus........... id eialele’e's do. 8 jAug.18 
17 Pettychaps——Motacilla hortensis ........ do. 12 |Sept.11 
18 Land Rail Rallus crex ...... eeeveccesst do. 141 do. 30 
19 Flycatcher-——Muscicapa grisola .....-.--.] do. 14} do. 13 
20 Sedge Warbler——Motacilla salicaria...... do, 19 
{21 Red-backed Shrike—— Lanius collurio......} do, 
2% Goatsucker-——Caprimulgus Europeus .... do. 
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