Apus apus (Common swift) activity

See the main page for notes, photos, and diaries for all years.

Activity in inspected boxes, all years (prediction in red italic; '≤' 'less-than-or-equal' or '≥' 'greater than or equal' date could be earlier/later).
YearNestAdult1Adult2Egg1Egg2Egg3HatchFledge1Fledge2Fledge3Comments
2013#1May-6May-15May-25May-28May-31Jun-17Jul-30Jul-31Aug-1
YearNestAdult1Adult2Egg1Egg2Egg3HatchFledge1Fledge2Fledge3Comments
2014#1May-5May-9May-22May-25-Jun-13Jul-26Jul-27-
2014#4May-7May-13May-24May-26-Jun-13Jul-24Jul-26-
YearNestAdult1Adult2Egg1Egg2Egg3HatchFledge1Fledge2Fledge3Comments
2015#1May-5May-8May-22May-24May-26Jun-15Jul-29Jul-31Aug-2
2015#4May-4May-10May-19May-21May-24Jun-12Jul-21Jul-21Jul-23
YearNestAdult1Adult2Egg1Egg2Egg3HatchFledge1Fledge2Fledge3Comments
2016#1May-4May-7May-20May-22-xOne adult disappeared Jun-1
2016#1aJun-7Jun-15Jun-17-Jul-5Aug-16Aug-18-New adult arrived Jun-7
2016#4May-5May-5May-14May-16-Jun-4Jul-16Jul-16-
2016#g3??Jun-17Jun-19-Jul-8?Aug-18/20Aug-22-
2016#g6???Jul-18/21?-xEggs gone Aug-5
YearNestAdult1Adult2Egg1Egg2Egg3HatchFledge1Fledge2Fledge3Comments
2017#1May-6May-15May-22May-25-Jun-14Jul-26--2nd egg didn't hatch
2017#4May-5May-9May-18May-20May-22Jun-8Jul-19Jul-22Jul-22
2017#g3?≤May-17?≤May-28-≤Jun-16xJun-30, no eggs or young, one chick carcase
2017#g3a??Jul-1/5Jul-3/7-≤Jul-25Sep-9--Re-lay after earlier failure. One chick died at a few days old.
2017#g6?≤May-17?≤May-28-≤Jun-16Jul-25Jul-25-Jun-30, 2 chicks present
YearNestAdult1Adult2Egg1Egg2Egg3HatchFledge1Fledge2Fledge3Comments
2018#1May-7May-8May-18May-21-Jun-9Jul-22Jul-23-
2018#2??≤Jun-29?-Jul-17Aug-24--2nd egg not in nest, replaced, but didn't hatch.
2018#4May-18May-23May-31Jun-2Jun-4Jun-20Jul-30Jul-31-2 chicks. One egg didn't hatch.
2018#g1??≥Jun-3≤Jun-7?≤Jun-29Aug-4/7Aug-4/7Aug-4/73 chicks seen Jun-29, one newly hatched, others larger.
2018#g3?≤May-14May-20May-22May-24Jun-10Jul-23?Jul-23?Jul-23
2018#g4??≥Jun-16≤Jun-23-Jul-5/12Aug-20--Jul-4, now only one egg. Chick first seen Jul-12.
2018#g6?≤May-14≥May-25≤May-29-Jun-15/17Jul-24Jul-25-May-24, one damaged egg, not in nest. 2 chicks first seen Jun-23.
2018#sb2?≤May-28Jun-4Jun-6-Jun-25?Aug-3Aug-3-'Starling' box. Chicks first seen Jul-1.
YearNestAdult1Adult2Egg1Egg2Egg3HatchFledge1Fledge2Fledge3Comments
2019#1May-7May-11May-18May-20May-22Jun-9Jul-22Jul-23Jul-24
2019#2≤May-16???-≤Jun-21Aug-2Aug-2-
2019#3≤May-13?May-25/27??~Jun-16Jul-25/30Jul-25/30Jul-25/30
2019#4May-15May-16*May-23May-25May-27Jun-13Jul-24--*First egg removed by 'intruder' swift on May-24. Replaced in nest May-27, but didn't hatch. Only 1 egg hatched.
2019#5≤May-14?≤May-24May-25May-27~Jun-13Jul-25/30Jul-25/30Jul-25/30Swifts took over house-sparrow nest.
2019#g1≤May-12?≤May-24??≤Jun-16xNest empty Jun-21, eggs/embryo on ground outside.
2019#g1a??Jul-2/7≤Jul-8-~Jul-24Sep-3Sep-5-Re-lay by same or different birds.
2019#g3≤May-12≤May-27???~Jun-16Jul-27/30Jul-27/30Jul-27/30
2019#g4?≤May-24???~Jun-16Jul-27/30Jul-27/30Jul-27/30
2019#g6≤May-10≤May-27???≤Jun-16≤Jul-24≤Jul-24Jul-27/30
2019#sb2May-15≤May-17≥May-23≤May-27?~Jun-16Jul-28Jul-28-Only 2 of 3 eggs hatched.
YearNestAdult1Adult2Egg1Egg2Egg3HatchFledge1Fledge2Fledge3Comments
2020#1May-9May-22Jun-20Jun-23-Jul-12Aug-24--Only 1 egg hatched.
2020#2≤May-5≤May-24Jun-3Jun-5-xNo eggs or chicks Jun-21.
2020#2a??Jun-23Jun-25-≤Jul-16Aug-24x-Re-lay by same or different birds. One chick left early and died.
2020#3≤May-17≤May-22≥May-29≤Jun-3Jun-6Jun-22/23Aug-2Aug-3/4x1 chick died.
2020#4May-4May-8May-17May-19May-21Jun-5 & 7 & 8Jul-16Jul-20Jul-23
2020#5≤May-5≤May-21≥May-29May-31/Jun-1≤Jun-3≤Jun-21Jul-26Aug-1/2Aug-2
2020#g1??≤May-28≤Jun-3≤Jun-3Jun-18Jul-27/29Jul-29/30Aug-4/5
2020#g3??≥May-18≤May-21≤Jun-3≤Jun-9 & 10Jul-22/23Jul-22/23xOnly 2 chicks Jun-21.
2020#g4??≤Jun-3xEgg gone Jun-9/10
2020#g4a??Jun-25≤Jun-29-≤Jul-16Aug-26/27Aug-28/29-Re-lay by same or different birds.
2020#g6??≤May-17≤Jun-3≤Jun-3≤Jun-9Jul-17/19Jul-17/19Jul-21/22
2020#sb2≤May-6≤May-28Jun-4/5x1 broken egg Jun-3, 0 eggs Jun-8.
YearNestAdult1Adult2Egg1Egg2Egg3HatchFledge1Fledge2Fledge3Comments
2021#1May-7May-11≤Jun-17Jun-19Jun-21Jul-14Aug-26Aug-26-Pair overnight May-19, but only settled Jun-10. One egg didn't hatch.
2021#2≤May-11≤May-24May-31Jun-2-Jun-20Jul-30/Aug-1Aug-1/2-
2021#3≤May-8?May-31Jun-2Jun-4≤Jun-23Jul-30/Aug-1Aug-1/2Aug-1/2
2021#4May-9May-12Jun-5xEgg 1 broken Jun-6.
2021#4a≤Jun-10≤Jun-10Jun-17Jun-19-Jul-7Aug-17Aug-18-Re-lay by same or different birds, first settled Jun-10.
2021#5≤May-24≤May-30Jun-1/2Jun-4Jun-6≤Jun-23Aug-1/2Aug-2Aug-4
2021#g1??Jun-1/2Jun-4?≤Jun-23Aug-1/2Aug-4/5xSmall chick dead Jul-4.
2021#g2??Jun-8?-Jun-28Aug-8/9Aug-9/10-
2021#g3≤May-11?≤May-19May-20/22≤May-24Jun-10Jul-24/25Jul-24/25Jul-25/26
2021#g4??Jun-3Jun-6-≤Jun-26Aug-4/5Aug-4/5-
2021#g5≤Jun-15?Jun-23Jun-25-Jul-14≤Aug-23Aug-24-
2021#g6≤May-11≤May-11≤May-30May-31Jun-2≤Jun-22Jul-30/Aug-1Jul-30/Aug-1Jul-30/Aug-1
2021#sb1≤Jun-26≤Jun-26Jul-7--Jul-25/26Sep-5--
2021#sb2≤May-8≤May-23May-31Jun-2-≤Jun-25Aug-1/2--1 broken egg removed Jun-2.
2021#sb3≤Jun-9≤Jun-9≤Jul-2--≤Jul-17≤Aug-27--
2021#sb4≤Jun-15≤Jun-15Jun-28/29?-Jul-21Aug-27/30--1 egg broken Jul-18.
YearNestAdult1Adult2Egg1Egg2Egg3HatchFledge1Fledge2Fledge3Comments
2022#1May-8May-11May-23May-26May-28Jun-16Jul-26Jul-27Jul-29
2022#2≤May-14?≤May-22May-24-Jun-11≤Jul-21?x*Jul-22One chick died. *A chick which had left some other nest early added on Jul-19.
2022#3≤May-13?≤May-21≤May-23May-26Jun-11Jul-21Jul-23/25Jul-23/25
2022#4May-10May-12May-25May-28May-30/31Jun-16Jul-26/27Jul-29Jul-29
2022#5≤May-9≤May-15≤May-22May-24May-27Jun-11≤Jul-21/23≤Jul-21/23Jul-28/29
2022#g1??≤May-23May-25May-28≤Jun-14≤Jul-21≤Jul-21Jul-23/25
2022#g2≤May-14?≤May-22≤May-24May-25Jun-11≤Jul-21≤Jul-23Jul-23/25
2022#g3≤May-13?≤May-23May-24/25May-27≤Jun-14≤Jul-21Jul-23/25Jul-25/27
2022#g4??May-25May-27May-29/30Jun-15Jul-25/27Jul-25/27Jul-28/29
2022#g5≤May-18≤May-18May-31≤Jun-2?Jun-23?Jul-27/28Jul-30/Aug-1Aug-1/21 egg May-24 but thrown out.
2022#g6≤May-13?≤May-21≤May-23May-24/27≤Jun-14≤Jul-21Jul-23/25-1 egg disappeared.
2022#sb1≤Jun-2≤Jun-2Jun-12/13Jun-14/15-≤Jul-3x--2nd egg didn't hatch. Single chick dead by Jul-21.
2022#sb2≤May-13
2022#sb3≤May-15≤May-16May-26≤May-30-Jun-16/17?x--1st egg broken May-27. Single chick dead by Jul-21.
2022#sb4May-17/18May-17/18≤May-25≤May-27-Jun-14/15?≤Jul-19x-One maybe fledged - on ground and transferred to #2. 2nd chick dead by Jul-21.
YearNestAdult1Adult2Egg1Egg2Egg3HatchFledge1Fledge2Fledge3Comments

Predicted dates above based on the average for previous nests with camera: last egg to hatching 19 days; hatching to first fledging 42 days.


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Author: Clarke Brunt (clarke.brunt@viridis.net)
Last modified: 2nd August 2022