Mostly songbirds and often with an added byline :)

1.3.8  The Swan
1.3.9  Skylark
1.4.0  Diamond Dove
1.4.1  Lyrebird
1.5.0  The Robin
1.5.1  Jenny Wren
1.5.2  Goldfinch
1.5.3  Swift
1.5.4  Blackbird
1.5.5  Mistle Thrush
1.5.6  Fieldfare
1.5.7  Nightingale
1.5.8  Kingfisher
1.5.9  Sparrow
1.5.10 Redwing
1.5.11 Waxwing

Only doing the more signifiant releases from here on.
1.6.0  Reed Warbler
1.7.0  Pipit
2.0 Northern Cardinal
2.1.0 Marsh Warbler
2.2.0 Blackcap
2.3.0 Painted Bunting