| 30/04/17 | Hobby | College Lake | 1 | M Collard |
| also presumed Daubentons Bat over Visitor Centre. |
| 30/04/17 | Lesser Whitethroat | Rowsham | 4 | M Wallen |
| Singing males. Still on same territories. |
| 30/04/17 | Skylark | Rowsham | 10 | M Wallen |
| Singing males- at least. |
| 30/04/17 | Meadow Pipit | Rowsham | 8 | M Wallen |
| Singing males- the highest number ever singing here. |
| 30/04/17 | Wheatear | Rowsham | 3 | M Wallen |
| 1 male, 2 fem. New in this morning. |
| 30/04/17 | Yellow Wagtail | Rowsham | 1 | M Wallen |
| Over garden. |
| 30/04/17 | Lesser Whitethroat | College Lake | 1 | S E Douglas |
| One singing unseen in scrub and then, amazingly flew out and perched on branch for photo opportunity (photo). |
| 30/04/17 | Yellow Wagtail | College Lake | 2 | S E Douglas |
| Two flew onto bund near octagon hide and one moved onto the roof of the hide briefly. |
| 30/04/17 | Wheatear | Tattenhoe Park, Milton Keynes | 1 | H Appleyard |
| fem. Looking for insects in field near the linear park. SP827334. |
| 30/04/17 | Dunlin | Little Marlow GP | 1 | K Holt |
19:00
| |
| 30/04/17 | Little Tern | Little Marlow GP | 2 | K Holt |
18:00
| Seemed to have gone from about 18:00. |
| 30/04/17 | Black Tern | Little Marlow GP | 1 | K Holt |
19:00
| Flying mostly on east side of lake but also seen in southwest corner. |
| 30/04/17 | Hobby | Little Marlow GP | 1 | K Holt |
14:30
| |
| 30/04/17 | Cuckoo | Little Marlow GP | 1 | K Holt |
18:00
| Calling from works area (north of lake) then flew southwest. |
| 30/04/17 | Oystercatcher | Little Marlow GP | 1 | K Holt |
18:00
| |
| 30/04/17 | Little Egret | Little Marlow GP | 2 | K Holt |
17:00
| Sadly, none seen on nests for several days. |
| 30/04/17 | Swift | Little Marlow GP | 4 | K Holt |
17:00
| |
| 30/04/17 | Ringed Plover | Little Marlow GP | 2 | K Holt |
15:00
| |
| 30/04/17 | Little Ringed Plover | Little Marlow GP | 11 | K Holt |
14:00
| |
| 30/04/17 | Grey Wagtail | Startop's End Reservoir (Bucks Section) | 1 | L Evans |
| |
| 30/04/17 | Yellow Wagtail | Startop's End Reservoir (Bucks Section) | 2 | L Evans |
| |
| 30/04/17 | Common Tern | Startop's End Reservoir (Bucks Section) | 24 | L Evans |
| |
| 30/04/17 | Black Tern | Startop's End Reservoir (Bucks Section) | 1 | L Evans |
| Literally just off the car park this evening. |
| 30/04/17 | Reed Warbler | College Lake | 3 | L Evans |
| |
| 30/04/17 | Black-headed Gull | College Lake | 27 | L Evans |
| 19 adults all crammed onto the raft - many nests now occupied as well as the single Moorhen nest!! |
| 30/04/17 | Dunlin | College Lake | 1 | L Evans |
| Summer-plumaged bird on spit on main marsh. |
| 30/04/17 | Common Sandpiper | College Lake | 2 | L Evans |
| In far NW corner of Deep Lake. |
| 30/04/17 | Redshank | College Lake | 6 | L Evans |
| |
| 30/04/17 | Greenshank | College Lake | 1 | L Evans |
| In far NW corner of the Deep Lake. |
| 30/04/17 | Egyptian Goose | Little Marlow GP | 2 | L Evans |
| Pair with 5 goslings. |
| 30/04/17 | Little Egret | Little Marlow GP | 1 | L Evans |
| |
| 30/04/17 | Garden Warbler | Little Marlow GP | 3 | L Evans |
| 3 singing males in scrub by railway. |
| 30/04/17 | Lapwing | Little Marlow GP | 4 | L Evans |
15:30
| |
| 30/04/17 | Oystercatcher | Little Marlow GP | 1 | L Evans |
15:30
| |
| 30/04/17 | Little Ringed Plover | Little Marlow GP | 7 | L Evans |
15:30
| |
| 30/04/17 | Ringed Plover | Little Marlow GP | 2 | L Evans |
15:30
| |
| 30/04/17 | Common Tern | Little Marlow GP | 12 | L Evans |
15:30
| |
| 30/04/17 | Little Tern | Little Marlow GP | 2 | L Evans |
15:30
| Two adults constantly flying back and forth over east side of pit. |
| 30/04/17 | Black Tern | Little Marlow GP | 1 | L Evans |
15:30
| Still present at east end. |
| 30/04/17 | Garden Warbler | Pitstone Quarry | 2 | L Evans |
08:00
| 2 singing males. |
| 30/04/17 | Little Ringed Plover | Pitstone Quarry | 6 | L Evans |
08:00
| |
| 30/04/17 | Dunlin | Pitstone Quarry | 1 | L Evans |
08:00
| Single summer plumaged bird but missed the 2 Whimbrels by just 8 minutes - both flew off east. |
| 30/04/17 | Swift | Little Marlow GP | 2 | A D Bassett |
| |
| 30/04/17 | Whitethroat | Little Marlow GP | 2 | A D Bassett |
| |
| 30/04/17 | Sedge Warbler | Little Marlow GP | 1 | A D Bassett |
| By Spade Oak pub. |
| 30/04/17 | Oystercatcher | Little Marlow GP | 1 | A D Bassett |
| |
| 30/04/17 | Common Sandpiper | Little Marlow GP | 1 | A D Bassett |
| |
| 30/04/17 | Little Ringed Plover | Little Marlow GP | 7 | A D Bassett |
| |
| 30/04/17 | Dunlin | Little Marlow GP | 1 | A D Bassett |
| |
| 30/04/17 | Ringed Plover | Little Marlow GP | 1 | A D Bassett |
| Flew in 8:00. |
| 30/04/17 | Goldcrest | Tattenhoe, Milton Keynes | 1 | H Appleyard |
| Singing near Howe Park Wood. |
| 30/04/17 | Song Thrush | Tattenhoe, Milton Keynes | 6 | H Appleyard |
| Including 3 singing. |
| 30/04/17 | Tawny Owl | Howe Park Wood, Milton Keynes | 1 | H Appleyard |
| Surrounded by several blackbirds making alarm calls this morning. |
| 30/04/17 | Reed Bunting | Little Marlow GP | 1 | P J Stevens |
| Singing. |
| 30/04/17 | Garden Warbler | Little Marlow GP | 3 | P J Stevens |
| 2 singing on south side and one near the concrete track. |
| 30/04/17 | Cuckoo | Little Marlow GP | 1 | A Stow |
17:22
| Calling for 25mins then flew South west. |
| 30/04/17 | Common Sandpiper | Willen Lake North, Willen Lakes | 1 | R Norris |
17:15
| |
| 30/04/17 | Common Tern | Willen Lake North, Willen Lakes | 5 | R Norris |
17:15
| In addition to the 78 on South Lake. |
| 30/04/17 | Oystercatcher | Willen Lake South, Willen Lakes | 2 | R Norris |
17:15
| On the ski 'furniture '. |
| 30/04/17 | Common Tern | Willen Lake South, Willen Lakes | 78 | R Norris |
17:15
| Think they were all common, definitely no Black or Little amongst them. |
| 30/04/17 | Lesser Whitethroat | Wooburn Common | 1 | P J Stevens |
09:00
| Singing near the Broad Lane entrance to Farm Wood. |
| 30/04/17 | Whinchat | Springfield Quarry | 1 | P J Stevens |
| Feeding around clumps of nettles and brambles in the SW corner. Surprisingly difficult to see, even when perched on top of bramble. |
| 30/04/17 | Skylark | Springfield Quarry | 5 | P J Stevens |
| |
| 30/04/17 | Whitethroat | Springfield Quarry | 2 | P J Stevens |
| Singing. |
| 30/04/17 | Wheatear | Springfield Quarry | 2 | P J Stevens |
| male. On gravel in SW corner, SE of Lillyfee Farm. |
| 30/04/17 | Little Ringed Plover | Little Marlow GP | 11 | A J Stevens |
| |
| 30/04/17 | Ringed Plover | Little Marlow GP | 2 | A J Stevens |
| |
| 30/04/17 | Oystercatcher | Little Marlow GP | 1 | A J Stevens |
| |
| 30/04/17 | Dunlin | Little Marlow GP | 1 | A J Stevens |
| |
| 30/04/17 | Common Sandpiper | Little Marlow GP | 1 | A J Stevens |
| |
| 30/04/17 | Black Tern | Little Marlow GP | 1 | A J Stevens |
| |
| 30/04/17 | Little Tern | Little Marlow GP | 2 | A J Stevens |
| |
| 30/04/17 | Hobby | Little Marlow GP | 1 | A J Stevens |
| With JN. |
| 30/04/17 | Peregrine | Little Marlow GP | 2 | A J Stevens |
| 1 am 1pm. |
| 30/04/17 | Blackcap | Chesham Bois Woods | 3 | R G Bibby |
| |
| 30/04/17 | Great Spotted Woodpecker | Chesham Bois Woods | 1 | R G Bibby |
| |
| 30/04/17 | Green Woodpecker | Chesham Bois Woods | 1 | R G Bibby |
| |
| 30/04/17 | Lesser Whitethroat | Quainton | 1 | M S Hunt |
| Singing. |
| 30/04/17 | Lesser Whitethroat | Waddesdon | 1 | M S Hunt |
| Singing. |
| 30/04/17 | Lesser Whitethroat | Hogshaw | 1 | M S Hunt |
| Singing. |
| 30/04/17 | Green Woodpecker | Stowe | 4 | M S Hunt |
| |
| 30/04/17 | Gadwall | Stowe | 2 | M S Hunt |
| Pair. |
| 30/04/17 | Chiffchaff | Stowe | 1 | M S Hunt |
| Singing. |
| 30/04/17 | Lesser Whitethroat | Stowe | 1 | M S Hunt |
| Singing. |
| 30/04/17 | Blackcap | Stowe | 4 | M S Hunt |
| Singing. |
| 30/04/17 | Grey Wagtail | Stowe | 1 | M S Hunt |
| Male in song. |
| 30/04/17 | House Martin | Stowe | 3 | M S Hunt |
| |
| 30/04/17 | Sand Martin | Stowe | 10 | M S Hunt |
| |
| 30/04/17 | Swallow | Stowe | 6 | M S Hunt |
| |
| 30/04/17 | Little Grebe | Stowe | 3 | M S Hunt |
| |
| 30/04/17 | Peregrine | Little Marlow GP | 1 | J E Rose |
12:00
| Flew over the sand spit and dived at a Red Kite. |
| 30/04/17 | Little Ringed Plover | Little Marlow GP | 7 | J E Rose |
12:00
| At least. |
| 30/04/17 | Black Tern | Little Marlow GP | 1 | J E Rose |
12:00
| |
| 30/04/17 | Ringed Plover | Little Marlow GP | 1 | J E Rose |
12:00
| But apparently 2 seen earlier. |
| 30/04/17 | Little Tern | Little Marlow GP | 2 | J E Rose |
12:00
| Just arrived. Found by AS. |
| 30/04/17 | Temminck's Stint | Little Marlow GP | | J E Rose |
12:00
 | Seems to have gone. Not seen since a Peregrine buzzed the sand spit. |
| 30/04/17 | Little Tern | Little Marlow GP | 2 | T James |
12:00
| Viewed from south side. |
| 30/04/17 | Little Tern | Little Marlow GP | 2 | A J Stevens |
11:45
| Over the East side. |
| 30/04/17 | Peregrine | Little Marlow GP | 1 | A D Bassett |
| Flew low over spit late morning. |
| 30/04/17 | Ringed Plover | Little Marlow GP | 2 | A D Bassett |
| Another arrived mid morning. |
| 30/04/17 | Temminck's Stint | Little Marlow GP | 1 | A D Bassett |
| Small wader found mid morning by visiting birder was not identified to species. |
| 30/04/17 | Temminck's Stint | Little Marlow GP | 1 | A J Stevens |
| Summer plumaged bird on the spit. |
| 30/04/17 | Cuckoo | Linford Reserve, Linford GPs | 1 | R S Hill |
| |
| 30/04/17 | Common Tern | Linford Reserve, Linford GPs | 12 | R S Hill |
| |
| 30/04/17 | Curlew | Linford Reserve, Linford GPs | 1 | R S Hill |
| In field by river Ouse. |
| 30/04/17 | Common Sandpiper | Floodplain Forest Nature Reserve (formerly Manor Farm) | 1 | R S Hill |
| |
| 30/04/17 | Yellow Wagtail | Floodplain Forest Nature Reserve (formerly Manor Farm) | 2 | R S Hill |
| |
| 30/04/17 | Great White Egret | Floodplain Forest Nature Reserve (formerly Manor Farm) | 1 | R S Hill |
| Dark billed bird, so presume transitional adult (no aigrettes and dark tibia) briefly on stilt pot before flying east. |
| 30/04/17 | Hobby | Broughton, Aylesbury | 1 | G Du Boulay |
09:40
| |
| 30/04/17 | Whitethroat | Broughton, Aylesbury | 1 | G Du Boulay |
09:40
| |
| 30/04/17 | Green Woodpecker | Broughton, Aylesbury | 1 | G Du Boulay |
09:30
| |
| 30/04/17 | Buzzard | Broughton, Aylesbury | 1 | G Du Boulay |
09:15
| |
| 30/04/17 | Common Tern | Broughton, Aylesbury | 2 | G Du Boulay |
08:45
| |
| 30/04/17 | Grey Heron | Broughton, Aylesbury | 1 | G Du Boulay |
08:45
| |
| 30/04/17 | Willow Warbler | Broughton, Aylesbury | 1 | G Du Boulay |
08:45
| |
| 30/04/17 | Sedge Warbler | Broughton, Aylesbury | 1 | G Du Boulay |
08:30
| and numerous others along canalside. |
| 30/04/17 | Reed Bunting | Broughton, Aylesbury | 2 | G Du Boulay |
08:20
| |
| 30/04/17 | Jay | Broughton, Aylesbury | 1 | G Du Boulay |
08:00
| |
| 30/04/17 | Mediterranean Gull | Little Marlow GP | 2 | A D Bassett |
| Flew straight over east at 8:00. |
| 30/04/17 | Swift | Little Marlow GP | 2 | A D Bassett |
| |
| 30/04/17 | Whitethroat | Little Marlow GP | 2 | A D Bassett |
| |
| 30/04/17 | Sedge Warbler | Little Marlow GP | 1 | A D Bassett |
| By Spade Oak pub. |
| 30/04/17 | Oystercatcher | Little Marlow GP | 1 | A D Bassett |
| |
| 30/04/17 | Common Sandpiper | Little Marlow GP | 1 | A D Bassett |
| |
| 30/04/17 | Little Ringed Plover | Little Marlow GP | 7 | A D Bassett |
| |
| 30/04/17 | Dunlin | Little Marlow GP | 1 | A D Bassett |
| |
| 30/04/17 | Ringed Plover | Little Marlow GP | 1 | A D Bassett |
| Flew in 8:00. |
| 30/04/17 | Black Tern | Little Marlow GP | 1 | A D Bassett |
| Arrived on east side at 8:30. |