RAII NOMINA.
17. Middle willow-wren, Regulus non cristatus. Middle of June; begins in April.
18. Redstart, Ruticilla. Ditto; begins in May.
19. Chaffinch, Fringilla. Beginning of June; sings first in April.
20. Nightingale, Luscinia. Middle of June; sings first in April.

Birds that sing for a short time, and very early in the spring:—

RAII NOMINA.
21. Missel-bird, Turdus viscivorus. January 2nd, 1770, in February. Is called Hampshire and Sussex the storm-cock, because its song is supposed to forebode windy wet weather: it is the largest singing bird we have.
22. Great tit-mouse, or ox-eye. Fringillago. In February, March, April; re-assumes for a short time in September.

Birds that have somewhat of a note or song, and yet are hardly to be called singing birds:—

RAII NOMINA.
23. Golden-crowned wren, Regulus cristatus. Its note as minute as its person; frequents the tops of high oaks and firs; the smallest British bird.
24. Marsh tit-mouse, Parus palustris. Haunts great woods; two harsh, sharp notes.
25. Small willow-wren, Regulus non cristatus. Sings in March, and on to September.
26. Largest ditto, Ditto. Cantat voce stridulâ locustæ; from end of April to August.
27. Grasshopper-lark, Alauda minima voce locustæ. Chirps all night, from the middle of April to the end of July.
28. Martin, Hirundo agrestis. All the breeding time; from May to September.
29. Bullfinch, Pyrrhula.
30. Bunting, Emberiza alba. From the end of January to July.

All singing birds, and those that have any pretensions to song, not only in Britain, but perhaps the world through, come under the Linnæan ordo of Passeres.

The above-mentioned birds, as they stand numerically, belong to the following Linnæan genera:—

1,7,10,27, Alauda 8,28, Hirundo.
2,11,21, Turdus. 13,16,19, Fringilla.
3,4,5,9,12, ) 22,24, Parus.
15,17,18,20, ) Motacilla 14,29, Loxia.
23,25,26, )
6,20, Emberiza.

Birds that sing as they fly are but few:—

RAII NOMINA.
Skylark, Alauda vulgaris. Rising, suspended, and falling.
Titlark, Alauda pratorum. In its descent; also sitting on trees, and walking on the ground.
Woodlark, Alauda arborea. Suspended; in hot summer nights all night long.
Blackbird, Merula. Sometimes from bush to bush.
Whitethroat, Ficedula affinis. Uses when singing on the wing odd jerks and gesticulations.
Swallow, Hirundo domestica. In soft sunny weather.
Wren, Passer troglodytes. Sometimes from bush to bush.