PASSERES. 
^ r der II, 
The Secon d Tribe, 
FISSIROSTRES DIURUL/E, or Diurnal Fissirostral Birds, 
guished from the nocturnal series by the closeness of their plumage. 
The 
second 
Family, 
W the 
len gth en 
HIRUNDINID^E, or Swallows, 
Pdl short and weak, very broad at the base, and suddenly compressed to the tip ; the TV ings 
d> narrow, and acute ; the Tail more or less forked ; and the Tarsi very short and weak. 
The 
first Subfamily, 
ha 
CYPSELINiE, or Swifts, 
'Ve the B’ll 
rtiargi ng • S 10ld ’ de P resse( T broad at the base, the sides suddenly compressed to the tip, and the 
l°Hg P e Aed ; the Nostrils large, and longitudinal on each side of the culmen; the \\ ings extremely 
xv ed, the Tarsi short and weak; the Toes short, thick, and armed with short, strong, and 
curved C K • 
c ws ; and the hind toe usually directed forwards. 
£ Cypselus Illig .* 
which ij l0lt and de P r essed, with the gape very wide, and the sides gradually compressed to the tip, 
the cuhji Ved ’ the nostrils basal, lateral, and large, with the opening longitudinal, on each side of 
Prigcst and the mar S ins beset with small feathers. Wings lengthened, with the second quill 
all di '' niodera t ( h forked, or uneven. Tarsi very short, and feathered to the base of the toes. 
^°d forwards, short, thick, and armed with short, curved, and compressed claws. 
Th( 
«s e 
I* nf 
<IV which theiv. , migrator y habits, prefer the warmer parts of the world. They pass most of their days on the wing, 
SlPfirlovi f .... -i mi • fl* .1.1 1 .-, «nv\icl iiAvfnvmnil m 
1 1 p". 1/11U UO VI M Vi*-.** * J X 
° 8tll en ec i ender forms and lengthened wings are admirably constructed. Their flight is rapid, performed in 
no a,. * ■ • (i . i * si* i j * ... 
’ y the stateT/tf 1 3 ° r “ extensivc curves, with hardly any motion of their wings. The height of their flight is regulated 
. "1 'kitnp atmosphere : in fine weather they fly in numbers, at a great elevation in the aii , but, during gloomy 
£ ** perform their “ - ^ 
. of th P - * ~"" J penorm then- evolutions closer to the ground. They sometimes skim the surface of the \\ ater 
, lgh b,1 ilding g U 1Wey5 w hich consists of insects. When they rest or pass the night, they generally seek holes, &c., m 
°' Vev er, Cn l trees - In such places the females also form their nests, of straw or similar materials ; the interior is, 
nei lted tocre+h . . . , , the birds of this 
BU T»ffltUily 
The e ^°^ edler wit h a glutinous substance, furnished by glands which are peculiar to tlie birds of this 
■' cS a,e usually two in number. 
* Thi 
ai1 ‘ e in t8l i'' aS T ° ri 2 ln aUy proposed by Scopoli, under the previously used appellation of Apus, in the 
1 0 other names have since been applied to this division, viz. Micropus and Brachypus, by W olff and Meyer. 
