House Martin

Delichon urbicum

 
Provisional map

 

SP81W - Buckland (Possible breeding / Absent) SP81S - Draytonmead Farm (Confirmed breeding / Absent) SP81X - Long Marston (Confirmed breeding / Confirmed breeding) SP81T - Thistlebrook Farm (Possible breeding / Absent) SP81Y - Alnwick Farm (Possible breeding / Absent) SP81Z - Crafton (Absent / Possible breeding) SP90V - Meadhams Farm (Possible breeding / Absent) SP90W - Orchard Leigh (Probable breeding / Absent) SP90X - Whelpley Hill Farm (Possible breeding / Confirmed breeding) SP90I - Cholesbury (Absent / Confirmed breeding) SP90N - Hawridge Common (Possible breeding / Absent) SP90T - Hockeridge Wood (Possible breeding / Absent) SP90Y - Berkhamsted S (Confirmed breeding / Confirmed breeding) SP90E - Spencersgreen (Confirmed breeding / Absent) SP90J - Hastoe (Possible breeding / Absent) SP90P - Champneys (Confirmed breeding / Confirmed breeding) SP90U - Northchurch (Probable breeding / Absent) SP90Z - Berkhamsted N (Confirmed breeding / Confirmed breeding) SP91A - Tring W (Confirmed breeding / Confirmed breeding) SP91F - Tring E (Confirmed breeding / Confirmed breeding) SP91K - New Ground (Absent / Probable breeding) SP91Q - Norcott Hill (Confirmed breeding / Possible breeding) SP91V - Berkhamsted Common (Possible breeding / Absent) SP91B - Little Tring (Possible breeding / Confirmed breeding) SP91G - New Mill (Confirmed breeding / Confirmed breeding) SP91L - Aldbury Nowers (Confirmed breeding / Probable breeding) SP91R - Aldbury (Probable breeding / Confirmed breeding) SP91W - Little Gaddesden (Confirmed breeding / Absent) SP91C - Wilstone (Confirmed breeding / Confirmed breeding) SP91H - College Lake (Probable breeding / Possible breeding) SP91M - Pitstone Hill (Confirmed breeding / Confirmed breeding) SP91X - Ringshall (Confirmed breeding / Possible breeding) SP91D - West End Farm (Confirmed breeding / Absent) SP91E - Mentmore (Confirmed breeding / Confirmed breeding) TL00A - Flaunden (Confirmed breeding / Absent) TL00F - Belsize (Possible breeding / Confirmed breeding) TL00K - Chipperfield (Confirmed breeding / Possible breeding) TL00Q - Berrybushes Wood (Confirmed breeding / Absent) TL00V - Abbots Langley (Confirmed breeding / Confirmed breeding) TL00B - Bovingdon (Confirmed breeding / Confirmed breeding) TL00G - Bulstrode (Probable breeding / Absent) TL00L - Whippendell Bottom (Confirmed breeding / Possible breeding) TL00R - Kings Langley (Confirmed breeding / Confirmed breeding) TL00W - Bedmond (Confirmed breeding / Confirmed breeding) TL00C - Bovingdon Airfield (Possible breeding / Possible breeding) TL00H - Westbrook Hay (Confirmed breeding / Absent) TL00M - Apsley (Confirmed breeding / Confirmed breeding) TL00S - Nash Mills (Confirmed breeding / Possible breeding) TL00X - Pimlico (Probable breeding / Absent) TL00D - Broadway Farm (Confirmed breeding / Possible breeding) TL00I - Chaulden (Confirmed breeding / Absent) TL00N - Hemel Hempstead (Confirmed breeding / Confirmed breeding) TL00T - Adeyfield (Confirmed breeding / Absent) TL00Y - Leverstock Green (Confirmed breeding / Absent) TL00E - Potten End (Confirmed breeding / Possible breeding) TL00J - Boxted Farm (Probable breeding / Probable breeding) TL00P - Gadebridge (Possible breeding / Possible breeding) TL00U - Grovehill (Confirmed breeding / Confirmed breeding) TL00Z - Buncefield (Possible breeding / Absent) TL01A - Nettleden (Confirmed breeding / Probable breeding) TL01F - Great Gaddesden (Confirmed breeding / Confirmed breeding) TL01K - Briden's Camp (Possible breeding / Probable breeding) TL01Q - Easbrookhay Farm (Confirmed breeding / Confirmed breeding) TL01V - The Aubreys (Confirmed breeding / Probable breeding) TL01B - Hudnall (Confirmed breeding / Probable breeding) TL01G - Widmore Farm (Confirmed breeding / Possible breeding) TL01L - Gaddesden Row (Confirmed breeding / Absent) TL01R - Puddephat's Farm (Absent / Absent) TL01W - Rabbitfield Spring (Confirmed breeding / Confirmed breeding) TL01C - Studhamhall Farm (Confirmed breeding / Absent) TL01H - Clement's End (Confirmed breeding / Confirmed breeding) TL01M - Beechwood House (Confirmed breeding / Confirmed breeding) TL01S - Flamstead (Confirmed breeding / Confirmed breeding) TL01X - Friar's Wash (Confirmed breeding / Confirmed breeding) TL01I - Dedmansey Wood (Confirmed breeding / Probable breeding) TL01N - Markyate W (Confirmed breeding / Possible breeding) TL01T - Markyate E (Confirmed breeding / Confirmed breeding) TL01Y - Pepsal End (Probable breeding / Absent) TL01P - Kensworth Lynch (Confirmed breeding / Possible breeding) TL01U - Caddington (Confirmed breeding / Confirmed breeding) TL01Z - Slip End (Confirmed breeding / Confirmed breeding) TL02Y - Galley Hill (Confirmed breeding / Absent) TL02Z - Barton Hill Farm (Confirmed breeding / Probable breeding) TL03V - Barton-le-Clay (Confirmed breeding / Confirmed breeding) TL10A - Kingswood (Confirmed breeding / Possible breeding) TL10F - Bricket Wood Common (Confirmed breeding / Possible breeding) TL10K - Netherwylde Farm (Confirmed breeding / Confirmed breeding) TL10Q - Harperbury (Confirmed breeding / Confirmed breeding) TL10V - Shenley (Confirmed breeding / Absent) TL10B - M25 Junction 21 (Confirmed breeding / Confirmed breeding) TL10G - Blackgreen Wood (Possible breeding / Probable breeding) TL10L - Frogmore (Confirmed breeding / Confirmed breeding) TL10R - Broad Colney (Confirmed breeding / Absent) TL10W - Salisbury Hall (Confirmed breeding / Absent) TL10C - Potters Crouch (Confirmed breeding / Confirmed breeding) TL10H - Chiswell Green (Confirmed breeding / Confirmed breeding) TL10M - St Julians (Confirmed breeding / Probable breeding) TL10S - London Colney N (Confirmed breeding / Absent) TL10X - Tyttenhanger (Confirmed breeding / Possible breeding) TL10D - Gorhambury (Confirmed breeding / Possible breeding) TL10I - Praewood Farm (Confirmed breeding / Possible breeding) TL10N - St Albans (Confirmed breeding / Confirmed breeding) TL10T - Fleetville (Confirmed breeding / Possible breeding) TL10Y - Smallford (Confirmed breeding / Possible breeding) TL10E - Hogg End (Confirmed breeding / Absent) TL10J - Batchwood Hall (Confirmed breeding / Confirmed breeding) TL10P - New Greens and Townsend (Confirmed breeding / Possible breeding) TL10U - Marshalswick (Confirmed breeding / Possible breeding) TL10Z - Beech Farm (Confirmed breeding / Absent) TL11A - Beaumont Hall (Confirmed breeding / Probable breeding) TL11F - Hedge's Farm (Confirmed breeding / Absent) TL11K - Cheapside Farm (Possible breeding / Confirmed breeding) TL11Q - Sandridge (Confirmed breeding / Confirmed breeding) TL11V - Symonshyde Great Wood (Possible breeding / Confirmed breeding) TL11B - Harpendenbury (Confirmed breeding / Confirmed breeding) TL11G - Hatching Green (Confirmed breeding / Confirmed breeding) TL11L - Harpenden SE (Confirmed breeding / Confirmed breeding) TL11R - Nomansland (Confirmed breeding / Absent) TL11W - Coleman Green (Absent / Absent) TL11C - Faulkners End Farm (Confirmed breeding / Possible breeding) TL11H - Harpenden NW (Confirmed breeding / Probable breeding) TL11M - Batford (Confirmed breeding / Probable breeding) TL11S - Marshalls Heath (Confirmed breeding / Absent) TL11X - Bride Hall (Possible breeding / Possible breeding) TL11D - West Hyde (Confirmed breeding / Confirmed breeding) TL11I - East Hyde (Confirmed breeding / Confirmed breeding) TL11N - Bower Heath (Probable breeding / Absent) TL11T - Blackmore End (Confirmed breeding / Confirmed breeding) TL11Y - Ayot St Lawrence (Probable breeding / Confirmed breeding) TL11J - Chiltern Green (Confirmed breeding / Possible breeding) TL11P - Ansells End (Confirmed breeding / Confirmed breeding) TL11U - Kimpton (Confirmed breeding / Absent) TL11Z - Kimpton Mill (Possible breeding / Absent) TL12F - Luton Airport (Confirmed breeding / Possible breeding) TL12K - Diamond End (Confirmed breeding / Possible breeding) TL12Q - Bendish (Probable breeding / Absent) TL12V - Whitwell (Confirmed breeding / Confirmed breeding) TL12B - Stopsley (Confirmed breeding / Confirmed breeding) TL12G - Tea Green (Probable breeding / Confirmed breeding) TL12L - The Heath (Confirmed breeding / Confirmed breeding) TL12R - Kingswalden Park (Probable breeding / Confirmed breeding) TL12W - Hitch Wood (Confirmed breeding / Confirmed breeding) TL12C - Butterfield Green (Possible breeding / Possible breeding) TL12H - Lilley Bottom (Probable breeding / Absent) TL12M - Ley Green (Possible breeding / Probable breeding) TL12S - Preston (Possible breeding / Confirmed breeding) TL12X - Poynders End (Probable breeding / Confirmed breeding) TL12D - Lilley (Probable breeding / Absent) TL12I - The Flints (Possible breeding / Absent) TL12N - Great Offley (Probable breeding / Confirmed breeding) TL12T - Offleyholes Farm (Confirmed breeding / Probable breeding) TL12Y - Gosmore (Possible breeding / Probable breeding) TL12E - Telegraph Hill (Probable breeding / Confirmed breeding) TL12J - Little Offley (Confirmed breeding / Probable breeding) TL12P - Gravehill Plantation (Probable breeding / Absent) TL12U - Hitchin SW (Absent / Probable breeding) TL12Z - Hitchin Hill (Confirmed breeding / Absent) TL13A - Hexton (Probable breeding / Confirmed breeding) TL13F - Tingley Wood (Absent / Absent) TL13K - Pirton (Confirmed breeding / Absent) TL13Q - Oughtonhead Common (Possible breeding / Possible breeding) TL13V - Ickleford (Probable breeding / Confirmed breeding) TL13B - Higham Gobion (Confirmed breeding / Absent) TL13G - Apsley End (Probable breeding / Confirmed breeding) TL13L - Burge End (Probable breeding / Confirmed breeding) TL13R - Holwell (Confirmed breeding / Possible breeding) TL13W - Ickleford Common (Confirmed breeding / Possible breeding) TL13S - Holwellbury (Confirmed breeding / Possible breeding) TL13X - Arlesey (Possible breeding / Confirmed breeding) TL20A - Ridge (Confirmed breeding / Confirmed breeding) TL20F - South Mimms (Confirmed breeding / Possible breeding) TL20K - Potters Bar (Confirmed breeding / Absent) TL20Q - Five Acre Wood (Confirmed breeding / Probable breeding) TL20V - Barvin Park (Possible breeding / Absent) TL20B - Redwell Wood Farm (Absent / Absent) TL20G - Royal Veterinary College (Confirmed breeding / Confirmed breeding) TL20L - Swanley Bar (Possible breeding / Probable breeding) TL20R - Queenswood (Confirmed breeding / Confirmed breeding) TL20W - Northaw (Confirmed breeding / Confirmed breeding) TL20C - North Mymms Park (Confirmed breeding / Confirmed breeding) TL20H - Welham Green (Confirmed breeding / Possible breeding) TL20M - Bell Bar (Confirmed breeding / Confirmed breeding) TL20S - Kentish Lane Farm (Confirmed breeding / Confirmed breeding) TL20X - Great Wood County Park (Confirmed breeding / Confirmed breeding) TL20D - Roehyde (Confirmed breeding / Absent) TL20I - South Hatfield (Confirmed breeding / Absent) TL20N - Woodside (Confirmed breeding / Confirmed breeding) TL20T - Wildhill (Possible breeding / Confirmed breeding) TL20Y - Little Berkhamsted (Confirmed breeding / Confirmed breeding) TL20E - Hatfield Aerodrome (Confirmed breeding / Confirmed breeding) TL20J - Birchwood (Confirmed breeding / Absent) TL20P - Home Park (Confirmed breeding / Absent) TL20U - Essendon (Confirmed breeding / Confirmed breeding) TL20Z - Howe Green (Confirmed breeding / Confirmed breeding) TL21A - Cromerhyde Farm (Possible breeding / Absent) TL21F - Stanborough (Possible breeding / Absent) TL21K - Hatfield Hyde (Confirmed breeding / Possible breeding) TL21Q - Holwell Court Farm (Confirmed breeding / Confirmed breeding) TL21V - Letty Green (Confirmed breeding / Confirmed breeding) TL21B - Brocket Park (Possible breeding / Possible breeding) TL21G - Sherrardspark (Confirmed breeding / Absent) TL21L - Peartree (Confirmed breeding / Confirmed breeding) TL21R - Panshanger Aerodrome (Confirmed breeding / Absent) TL21W - Panshanger Stables (Confirmed breeding / Possible breeding) TL21C - Ayot St Peter (Possible breeding / Possible breeding) TL21H - Digswell Park (Confirmed breeding / Confirmed breeding) TL21M - Digswell (Confirmed breeding / Absent) TL21S - Tewin (Confirmed breeding / Probable breeding) TL21X - Bramfield (Confirmed breeding / Probable breeding) TL21D - Pulmer Water (Confirmed breeding / Absent) TL21I - Welwyn (Confirmed breeding / Confirmed breeding) TL21N - Harmergreen Wood (Confirmed breeding / Absent) TL21T - Bull's Green (Confirmed breeding / Absent) TL21Y - Bramfield Woods (Possible breeding / Possible breeding) TL21E - Codicote (Confirmed breeding / Absent) TL21J - Tagmore Green (Confirmed breeding / Confirmed breeding) TL21P - Woolmer Green (Confirmed breeding / Possible breeding) TL21U - Datchworth (Confirmed breeding / Possible breeding) TL21Z - Watkin's Hall Farm (Confirmed breeding / Confirmed breeding) TL22A - Rusling End (Confirmed breeding / Absent) TL22F - Old Knebworth (Confirmed breeding / Confirmed breeding) TL22K - Knebworth (Confirmed breeding / Confirmed breeding) TL22Q - Bragbury End (Probable breeding / Absent) TL22V - Frogmore Hall (Confirmed breeding / Absent) TL22B - Langley Bottom (Possible breeding / Absent) TL22G - Norton Green (Probable breeding / Absent) TL22L - Broadwater (Confirmed breeding / Absent) TL22R - Aston (Confirmed breeding / Possible breeding) TL22W - Benington Lordship (Confirmed breeding / Confirmed breeding) TL22C - Almshoe Bury (Possible breeding / Absent) TL22H - Stevenage Old Town (Confirmed breeding / Confirmed breeding) TL22M - Pin Green (Confirmed breeding / Absent) TL22S - Chells Manor (Possible breeding / Possible breeding) TL22X - Walkern Lodge (Confirmed breeding / Absent) TL22D - Titmore Green (Confirmed breeding / Probable breeding) TL22I - Lister Hospital (Confirmed breeding / Possible breeding) TL22N - Chesfield Park (Probable breeding / Probable breeding) TL22T - Boxbury Farm (Probable breeding / Absent) TL22Y - Walkern (Confirmed breeding / Confirmed breeding) TL22E - Great Wymondley (Confirmed breeding / Probable breeding) TL22J - Rowley Court (Confirmed breeding / Possible breeding) TL22P - Damask Green (Confirmed breeding / Probable breeding) TL22U - Hall's Green (Possible breeding / Confirmed breeding) TL22Z - Cromer (Confirmed breeding / Possible breeding) TL23A - Letchworth Hall Hotel (Confirmed breeding / Absent) TL23F - Willian (Confirmed breeding / Confirmed breeding) TL23K - Lannock Manor (Probable breeding / Probable breeding) TL23Q - Weston (Probable breeding / Confirmed breeding) TL23V - Kingswoodbury (Confirmed breeding / Absent) TL23B - Letchworth West (Confirmed breeding / Confirmed breeding) TL23G - Letchworth East (Confirmed breeding / Confirmed breeding) TL23L - Baldock (Confirmed breeding / Probable breeding) TL23R - Bird Hill (Probable breeding / Absent) TL23W - Wallington (Confirmed breeding / Confirmed breeding) TL23C - Letchworth Sewage Works (Possible breeding / Absent) TL23H - Norton and Radwell (Possible breeding / Absent) TL23M - Bygrave Common (Probable breeding / Probable breeding) TL23S - The Firs (Confirmed breeding / Absent) TL23X - Bygrave Lodge Farm (Confirmed breeding / Confirmed breeding) TL23I - A1(M) Junction 10 (Probable breeding / Confirmed breeding) TL23N - Newnham (Confirmed breeding / Confirmed breeding) TL23T - Bygrave (Confirmed breeding / Confirmed breeding) TL23Y - Slip End (Possible breeding / Possible breeding) TL23J - Caldecote (Possible breeding / Confirmed breeding) TL23P - Newnham Hill (Possible breeding / Possible breeding) TL23U - Ashwell (Confirmed breeding / Confirmed breeding) TL23Z - Ashwell and Morden Station (Confirmed breeding / Confirmed breeding) TL24F - Hinxworth (Confirmed breeding / Confirmed breeding) TL24K - Ashwell End (Confirmed breeding / Confirmed breeding) TL24Q - Cold Harbour (Possible breeding / Absent) TL24V - Gatley (Confirmed breeding / Absent) TL24L - Dunton Lodge Farm (Confirmed breeding / Absent) TL24R - Guilden Morden S (Confirmed breeding / Possible breeding) TL24S - Guilden Morden N (Confirmed breeding / Probable breeding) TL30A - Cattlegate Farm (Confirmed breeding / Absent) TL30F - Theobalds Manor (Probable breeding / Confirmed breeding) TL30K - Theobalds Park (Possible breeding / Absent) TL30Q - Bowyers Water (Confirmed breeding / Absent) TL30B - Cuffley (Confirmed breeding / Absent) TL30G - Goff's Oak (Confirmed breeding / Confirmed breeding) TL30L - Flamstead End (Confirmed breeding / Probable breeding) TL30R - Seventy Acres Lake (Confirmed breeding / Absent) TL30C - Newgate Street (Absent / Absent) TL30H - Hammond Street (Confirmed breeding / Possible breeding) TL30M - Wormleybury (Possible breeding / Absent) TL30S - Turnford (Possible breeding / Absent) TL30D - Blackfan Wood (Absent / Probable breeding) TL30I - Cowheath Wood (Absent / Absent) TL30N - Carneles Green (Confirmed breeding / Absent) TL30T - Broxbourne (Confirmed breeding / Possible breeding) TL30Y - Nazeing Mead (Confirmed breeding / Confirmed breeding) TL30E - Bayford (Confirmed breeding / Possible breeding) TL30J - Monks Green (Confirmed breeding / Absent) TL30P - Goose Green (Absent / Absent) TL30U - Hoddesdon (Confirmed breeding / Probable breeding) TL30Z - Rye House Station (Confirmed breeding / Possible breeding) TL31A - Bayfordbury (Confirmed breeding / Confirmed breeding) TL31F - Brickendonbury (Confirmed breeding / Absent) TL31K - Hertford Heath (Confirmed breeding / Possible breeding) TL31Q - St Margarets (Confirmed breeding / Possible breeding) TL31V - Stanstead Abbotts (Confirmed breeding / Possible breeding) TL31B - Hertford North Station (Confirmed breeding / Confirmed breeding) TL31G - Hertford (Confirmed breeding / Confirmed breeding) TL31L - Rush Green (Confirmed breeding / Confirmed breeding) TL31R - Great Amwell (Confirmed breeding / Possible breeding) TL31W - Little Briggens (Confirmed breeding / Possible breeding) TL31C - Waterford (Confirmed breeding / Absent) TL31H - Ware Park Farm (Confirmed breeding / Possible breeding) TL31M - Ware (Confirmed breeding / Confirmed breeding) TL31S - Great Cozens (Confirmed breeding / Absent) TL31X - Wareside (Confirmed breeding / Confirmed breeding) TL31D - Stapleford (Confirmed breeding / Confirmed breeding) TL31I - Tonwell (Confirmed breeding / Confirmed breeding) TL31N - Wadesmill (Confirmed breeding / Confirmed breeding) TL31T - Fabdens (Confirmed breeding / Probable breeding) TL31Y - Bakers End (Confirmed breeding / Absent) TL31E - Watton at Stone (Confirmed breeding / Confirmed breeding) TL31J - Sacombe (Confirmed breeding / Absent) TL31P - Sacombe Green (Confirmed breeding / Confirmed breeding) TL31U - High Cross (Confirmed breeding / Absent) TL31Z - Barwick (Confirmed breeding / Possible breeding) TL32A - Whempstead (Probable breeding / Absent) TL32F - Dane End (Confirmed breeding / Absent) TL32K - Potter's Green (Confirmed breeding / Confirmed breeding) TL32Q - Colliers End (Confirmed breeding / Absent) TL32V - Latchford (Possible breeding / Confirmed breeding) TL32B - Burn's Green (Confirmed breeding / Absent) TL32G - Haultwick (Confirmed breeding / Confirmed breeding) TL32L - Levens Green (Confirmed breeding / Possible breeding) TL32R - Old Hall Green (Confirmed breeding / Absent) TL32W - Standon (Confirmed breeding / Confirmed breeding) TL32C - Clay End (Probable breeding / Possible breeding) TL32H - Wood End (Probable breeding / Absent) TL32M - Great Munden (Confirmed breeding / Confirmed breeding) TL32S - Hamels Park (Confirmed breeding / Confirmed breeding) TL32X - Braughing (Confirmed breeding / Confirmed breeding) TL32D - Ardeley (Possible breeding / Confirmed breeding) TL32I - Moor Green (Possible breeding / Confirmed breeding) TL32N - Whatbarn Farm (Absent / Absent) TL32T - Westmill (Confirmed breeding / Confirmed breeding) TL32Y - Dassels (Confirmed breeding / Possible breeding) TL32E - Bancroft Farm (Confirmed breeding / Confirmed breeding) TL32J - Cottered (Confirmed breeding / Possible breeding) TL32P - Aspenden Hall (Confirmed breeding / Possible breeding) TL32U - Buntingford (Confirmed breeding / Confirmed breeding) TL32Z - Hare Street (Confirmed breeding / Confirmed breeding) TL33A - Rushden (Confirmed breeding / Confirmed breeding) TL33F - Broadfield Hall (Confirmed breeding / Absent) TL33K - Little Butter Hill (Confirmed breeding / Absent) TL33Q - Wyddial (Confirmed breeding / Confirmed breeding) TL33V - Silkmead Farm (Absent / Possible breeding) TL33B - Roe Green (Confirmed breeding / Confirmed breeding) TL33G - Green End (Confirmed breeding / Confirmed breeding) TL33L - Buckland Bottom (Confirmed breeding / Confirmed breeding) TL33R - Capons Wood (Confirmed breeding / Confirmed breeding) TL33W - Cave Gate (Confirmed breeding / Absent) TL33C - Wheat Hill (Confirmed breeding / Confirmed breeding) TL33H - Philpott's Wood (Confirmed breeding / Confirmed breeding) TL33M - The Homestead (Confirmed breeding / Absent) TL33S - Strawberry Grove (Absent / Possible breeding) TL33X - Barkway (Confirmed breeding / Confirmed breeding) TL33D - Crouch Hill (Possible breeding / Possible breeding) TL33I - Kelshall (Confirmed breeding / Confirmed breeding) TL33N - Reed End (Confirmed breeding / Confirmed breeding) TL33T - Reed (Confirmed breeding / Confirmed breeding) TL33Y - Newsells (Confirmed breeding / Absent) TL33E - Lower Coombe Farm (Confirmed breeding / Confirmed breeding) TL33J - Church Hill (Confirmed breeding / Absent) TL33P - Mile End Farm (Confirmed breeding / Possible breeding) TL33U - Whiteley Hill (Confirmed breeding / Confirmed breeding) TL33Z - Barley (Confirmed breeding / Confirmed breeding) TL34F - Highfield Farm (Confirmed breeding / Absent) TL34K - Royston W (Confirmed breeding / Confirmed breeding) TL34Q - Royston E (Confirmed breeding / Confirmed breeding) TL34V - Noon's Folly Farm (Confirmed breeding / Absent) TL34L - Beauval Farm (Confirmed breeding / Probable breeding) TL34R - Holland Hall (Possible breeding / Possible breeding) TL41A - Briggens Park (Confirmed breeding / Confirmed breeding) TL41F - Eastwick (Confirmed breeding / Possible breeding) TL41K - Harlow Town Station (Confirmed breeding / Confirmed breeding) TL41B - Hunsdonbury (Confirmed breeding / Absent) TL41G - Eastwick Hall Farm (Absent / Absent) TL41L - Gilston Park (Confirmed breeding / Confirmed breeding) TL41R - Rowney Farm (Confirmed breeding / Absent) TL41W - Durrington Hall (Probable breeding / Confirmed breeding) TL41C - Hunsdon (Confirmed breeding / Confirmed breeding) TL41H - Hunsdon Lodge Farm (Confirmed breeding / Probable breeding) TL41M - Stonards (Possible breeding / Absent) TL41S - High Wych (Confirmed breeding / Absent) TL41X - Sawbridgeworth (Confirmed breeding / Confirmed breeding) TL41D - Little Blakesware (Probable breeding / Confirmed breeding) TL41I - Perry Green (Possible breeding / Absent) TL41N - Allen's Green (Confirmed breeding / Absent) TL41T - Trims Green (Probable breeding / Absent) TL41Y - Spellbrook (Possible breeding / Confirmed breeding) TL41E - Kettle Green (Probable breeding / Possible breeding) TL41J - Much Hadham (Confirmed breeding / Possible breeding) TL41P - Green Tye (Confirmed breeding / Absent) TL41U - Thorley (Possible breeding / Possible breeding) TL41Z - Thorley Street (Probable breeding / Absent) TL42A - Bromley (Confirmed breeding / Absent) TL42F - Hadham Ford (Confirmed breeding / Probable breeding) TL42K - Bury Green (Confirmed breeding / Possible breeding) TL42Q - Stortford Park (Confirmed breeding / Absent) TL42V - Bishop's Stortford (Probable breeding / Probable breeding) TL42B - Wellpond Green (Confirmed breeding / Possible breeding) TL42G - Albury End (Confirmed breeding / Confirmed breeding) TL42L - Hadham Hall (Possible breeding / Confirmed breeding) TL42R - Wickham Hall (Confirmed breeding / Confirmed breeding) TL42W - Foxdells Farm (Confirmed breeding / Absent) TL42C - Braughing Friars (Confirmed breeding / Absent) TL42H - Albury (Confirmed breeding / Probable breeding) TL42M - Clapgate (Confirmed breeding / Confirmed breeding) TL42S - Farnham (Absent / Absent) TL42X - Hazel End (Possible breeding / Absent) TL42D - Bozen Green (Possible breeding / Absent) TL42I - Furneux Pelham (Confirmed breeding / Confirmed breeding) TL42N - Hixham Hall (Confirmed breeding / Possible breeding) TL42T - Mallows Green (Absent / Absent) TL42E - Little Hormead (Possible breeding / Confirmed breeding) TL42J - Whitebarns (Absent / Absent) TL42P - Stocking Pelham (Possible breeding / Confirmed breeding) TL43A - Brick House Farm (Confirmed breeding / Probable breeding) TL43F - Brent Pelham (Confirmed breeding / Confirmed breeding) TL43K - Starling's Green (Possible breeding / Confirmed breeding) TL43B - Anstey (Confirmed breeding / Absent) TL43G - Meesden (Absent / Absent) TL43L - Further Ford End (Absent / Absent) TL43C - Nuthampstead (Confirmed breeding / Absent) TL43H - Langley Lawn (Confirmed breeding / Absent) TL43D - Abbotsbury Farm (Absent / Absent) TL43I - Chrishall Common (Possible breeding / Absent) TL43E - Chishall Windmill (Confirmed breeding / Possible breeding) TL44A - Clay Hill (Confirmed breeding / Confirmed breeding) TL51C - Gladwyns (Probable breeding / Possible breeding) TL52A - Start Hill (Confirmed breeding / Absent) TL52F - Tilekiln Green (Confirmed breeding / Confirmed breeding) TL52B - Birchanger (Confirmed breeding / Confirmed breeding) TL52C - Stansted Mountfitchet (Confirmed breeding / Confirmed breeding) TQ09A - Chalfont St Peter (Confirmed breeding / Probable breeding) TQ09F - West Hyde (Confirmed breeding / Absent) TQ09K - Harefield (Confirmed breeding / Confirmed breeding) TQ09Q - Battlers Wells Farm (Probable breeding / Confirmed breeding) TQ09V - Northwood (Confirmed breeding / Absent) TQ09B - Chalfont Common (Confirmed breeding / Confirmed breeding) TQ09G - Maple Cross (Probable breeding / Absent) TQ09L - Stocker's Lake (Confirmed breeding / Confirmed breeding) TQ09R - Batchworth Heath (Confirmed breeding / Confirmed breeding) TQ09W - Moor Park (Possible breeding / Possible breeding) TQ09C - Chorleywood West (Confirmed breeding / Confirmed breeding) TQ09H - Chorleywood Bottom (Confirmed breeding / Probable breeding) TQ09M - Rickmansworth (Confirmed breeding / Probable breeding) TQ09S - Croxley Green (Confirmed breeding / Confirmed breeding) TQ09X - Holywell (Confirmed breeding / Confirmed breeding) TQ09I - Chorleywood Common (Probable breeding / Confirmed breeding) TQ09N - Loudwater (Confirmed breeding / Confirmed breeding) TQ09T - Whippendell Wood (Possible breeding / Confirmed breeding) TQ09Y - Cassiobury Park (Confirmed breeding / Confirmed breeding) TQ09E - Chenies (Confirmed breeding / Confirmed breeding) TQ09J - Sarratt Bottom (Possible breeding / Confirmed breeding) TQ09P - Sarratt (Confirmed breeding / Confirmed breeding) TQ09U - Chandler's Cross (Possible breeding / Confirmed breeding) TQ09Z - Leavesden Green (Possible breeding / Confirmed breeding) TQ19A - Pinnerwood Park (Probable breeding / Absent) TQ19B - Oxhey Wood (Probable breeding / Absent) TQ19G - Carpenders Park (Absent / Probable breeding) TQ19L - Bentley Priory (Absent / Confirmed breeding) TQ19C - Oxhey (Confirmed breeding / Possible breeding) TQ19H - Bushey (Confirmed breeding / Absent) TQ19M - Bushey Heath (Confirmed breeding / Absent) TQ19S - Aldenham Reservoir (Possible breeding / Confirmed breeding) TQ19X - Edgewarebury (Probable breeding / Absent) TQ19D - Watford (Confirmed breeding / Probable breeding) TQ19I - Bushey Hall (Confirmed breeding / Absent) TQ19N - Letchmore Heath (Confirmed breeding / Confirmed breeding) TQ19T - Aldenham Park (Possible breeding / Confirmed breeding) TQ19Y - Borehamwood (Possible breeding / Absent) TQ19E - North Watford (Confirmed breeding / Absent) TQ19J - M1 Junction 5 (Confirmed breeding / Probable breeding) TQ19P - Batlers Green (Confirmed breeding / Possible breeding) TQ19U - Radlett (Confirmed breeding / Confirmed breeding) TQ19Z - Kitwells Farm (Confirmed breeding / Absent) TQ29C - Sterling Corner (Probable breeding / Absent) TQ29D - Rowley Green (Confirmed breeding / Absent) TQ29I - Galley Lane Farm (Possible breeding / Absent) TQ29N - High Barnet (Confirmed breeding / Probable breeding) TQ29E - Buckettsland Farm (Possible breeding / Confirmed breeding) TQ29J - Dancers Hill (Absent / Absent) TQ29P - Wrotham Park (Confirmed breeding / Absent) TQ29U - Hadley Wood (Confirmed breeding / Absent) TQ39U - Enfield Lock (Possible breeding / Absent)
Major towns Important bird sites 10km Square IDs

Tetrad counts

Status

Tetrads


Neither

64


Loss

183


Gain

36


Both

208


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