Cryptic Crossword No. 7

Across

5		Bird seen on migration in Tresco? (6)
6		Birds presented with bill for geranium (6)
9		Bird with bellyache (6)
10		Giddy dove circling another bird in the air (8)
11		A bird - or to put it another way, birds (4)
12		An eccentric breeds rats or birds (10)
13		Wrong note in port for sea-bird (7,4)
18		Bird going round town centre to cinema providing animal shelter (4,6)
21		Kill two birds with one stone - that includes birds' birthplace (4)
22		Bird seen on street in perambulator (8)
23		A bird has to mount it (6)
24		Wine for a bird (6)
25		Ruth or Rachel's first bird (6)

Down

1		Couple at work have sex (8)
2		Space traveller revealed by start of oscillation in measuring instrument (6)
3		25 of knitted jumper (4,4)
4		Girl's three articles (6)
5		Bird may be hitch for hikers (6)
7		Harebrained puss in pigpen (6)
8		What Elvis sang about - and where, too (6,5)
14		Mocking bird with lyre-shaped tail (8)
15		Outstanding feature of landscape - as well as mountain top circled by bird (8)
16		It's characteristic of a twitcher to follow the author of "The Raven" describing "The Raven" (6)
17		A beast of burden is the first to help (6)
19		River in southern highlands floods (6)
20		Spice Girls debut, having first met U.N. assembly (6)