BLAGDON LAKE BIRDS

Bat Box Monitoring


A number of wooden boxes were put up some time ago for bats to roost in but these fell into disrepair, having been damaged by woodpeckers and squirrels. So, they were replaced using Schwegler woodcrete boxes of two designs (2FN cylindrical two entrance and 1FF flat single entrance) in Chris Klee's time with Bristol Water, and monitored by him and Avon Bat Group. Eventually, it was decided that YACWAG would take over monitoring of the boxes, which is how the situation stands today. Five more boxes, including a hibernation box (1FW), were added to the scheme during 2012-14 bringing the total to 41 boxes. I've added more boxes (2F and 2F DFP) as these work well elsewhere for Nathusius's Pipistrelles. I've also put up a 1FS in the Pumping Station grounds hoping to attract our Natterer's Bat group to use it.

Spillway Box

Box No. >>>> H1
Box type - ent. aspect 1FW
Height of box 5 metres
Tree supporting box Grey Poplar
   
5 September 2014 22+ (9♂,2♀) SPip*

Pumping Station Boxes [North]

Box No. >>>> 1 2 3 4 5 19 A
Box type - ent. aspect 2FN - SE aspect 2FN - SW aspect 2FN 2FN - SE aspect 2FN - E aspect 2FN - SE aspect 1FF - S aspect
Height of box 5 metres 5 metres 5 metres 4 metres 4 metres 4 metres 4 metres
Tree supporting box Scot's Pine Scot's Pine Pedunculate Oak Scot's Pine Scot's Pine   Scot's Pine
30 August 2010              
16 October 2010 18 (2♂,13♀) Natt*     6 Natt     6 (1♂,5) SPip
20 August 2011 1♂ NPip 1 SPip Damaged/Repaired 2 SPip Empty   Droppings
6 May 2012 Birds Empty Empty 7♀ Natt Empty   5 SPip
17 November 2012 Empty Empty Empty Empty Empty   Empty
10 February 2013 Empty Empty Empty Empty Empty   1 CPip
19 May 2013   20♀ Natt          
26 September 2013 11 (6♂,2♀) Natt* 4 (1♂,3♀) SPip Damaged/Repaired [1 Natt]** Empty   Droppings
18 January 2014 Empty Empty Empty Empty Empty   1 Noct
5 September 2014 11 SPip 18 Natt Droppings Droppings Empty   8 SPip
12 October 2014 Empty Empty Empty Empty Empty   Droppings
25 April 2015 Empty Empty Empty Empty Droppings Empty 20♀ SPip

* some bats escaped when the box was opened

** suspected to have relocated from an earlier box check on the same date

Pumping Station Boxes [South]

Box No. >>>> 26 27 28
Box type - ent. aspect 2FN - W 2FN - SSW 2FN - S
Height of box 4 4 4
Tree supporting box      
25 April 2015 Empty Empty Empty

Pumping Station Boxes [West]

Box No. >>>> 29 K 30 L
Box type - ent. aspect 2FN 1FF 2FN 1FF
Height of box        
Tree supporting box        
12 June 2014 Probably empty Empty    
5 September 2014        
12 October 2014 Empty 1♂, 1♀ SPip Empty 1♂ SPip
25 April 2015 Birds 1♂ SPip Birds 1♂ SPip

* some bats escaped when the box was opened

Pipe Bay Copse & Entrance Drive Boxes

Box No. >>>> 6 7 8 9 B
Box type - ent. aspect 2FN - SSW aspect 2FN - SE aspect 2FN - SW aspect 2FN - S aspect 1FF - SSE aspect
Height of box 4 metres 4 metres 4 metres 4 metres 4 metres
Tree supporting box     Norway Maple    
20 August 2011 Birds & Droppings 1♂ SPip Birds Birds Droppings
6 May 2012 Birds Empty Birds Birds 1 SPip
17 November 2012 Empty Empty Empty Empty Empty
29 September 2013 Empty Empty Empty Empty 6 SPip
18 January 2014 Empty Empty Empty Empty Empty
5 September 2014 Empty Empty Empty Birds 4 SPip
25 April 2015 Empty Empty Empty Empty 9♀ SPip

Lodge Car Park & Lodge Copse Boxes

Box No. >>>> 31 32 C 10
Box type - ent. aspect 2F DFP - SW 2F - S 1FF - SW 2FN - SW
Height of box 4 metres 4 metres 5 metres 5 metres
Tree supporting box Scot's Pine Scot's Pine Norway Spruce Norway Spruce
16 August 2010     10♀ SPip  
20 August 2011     Empty Birds
6 May 2012     Empty Birds
29 September 2013     Empty Empty
18 January 2014     Empty Empty
12 June 2014     Empty Empty
28 September 2014     Empty Empty
25 April 2015 1♂ SPip Empty Empty Empty

Home Bay & Home Bay Point Boxes

Box No. >>>> 11 12 D 33 34 13 14
Box type - ent. aspect 2FN - SSW 2FN - SSW 1FF - SW 2F DFP - SSW 2F - SSW 2FN - S 2FN - SSE
Height of box 5 metres 4 metres 4 metres 4 metres 4 metres 4 metres 5 metres
Tree supporting box Scot's Pine Scot's Pine Scot's Pine Scot's Pine Scot's Pine Scot's Pine Scot's Pine
20 August 2011 1♂ SPip Birds 2 SPip     Birds Empty
6 May 2012 Birds Birds 1 SPip     Birds  
29 September 2013 Birds 1♂ CPip, 1♀ SPip 18+ Pip sp.     Birds Empty
18 January 2014 Empty Empty Empty     Empty Empty
12 June 2014     2 Pip sp.        
28 September 2014 1♂, 1♀ SPip Birds 2 Pip sp.     Birds Empty
25 April 2015 Birds Birds 1♂, 2♀ SPip Empty Empty Empty Empty

Holt Copse Boxes

Box No. >>>> 15 16 17 18 E 35 36
Box type - ent. aspect 2FN - S 2FN - S 2FN - S 2FN - SW 1FF - SE 2F DFP - E 2F - NE
Height of box 4 metres 4 metres 4 metres 4 metres 4 metres 4 metres 4 metres
Tree supporting box Pedunculate Oak Pedunculate Oak     Ash Sycamore Ash
20 August 2011 1♂ SPip Empty Empty Empty Fallen    
6 May 2012 Empty Birds Birds Birds Empty    
29 September 2013 Empty Empty Empty Empty 6 (1♂,5♀) CPip    
18 January 2014 Empty Empty Empty Empty Empty    
28 September 2014 Empty Bat droppings Birds Birds Empty    
25 April 2015 Birds Birds Birds Birds Empty Wasps Hornet

Indian Country Boxes

Box No. >>>> 20 21 22 23 F G
Box type - ent. aspect 2FN - SE aspect 2FN - E aspect 2FN - WNW aspect 2FN - N aspect 1FF - ENE aspect 1FF - NW aspect
Height of box 4 metres 4 metres 5 metres 5 metres 4 metres 4 metres
Tree supporting box Pine Pine Pine Pine Pine Pine
20 August 2011 Empty 2 (1♂,1) SPip Empty Empty 4 Spip 1 SPip
19 May 2013         9 SPip  
17 November 2013 Unknown nest Empty Empty Empty Empty Empty
12 October 2014 Empty Empty Empty Empty 1♂ SPip Empty

Spinney Point Boxes

Box No. >>>> 24 25
Box type - ent. aspect 2FN - NNW aspect 2FN - NNE aspect
Height of box 4 metres 4 metres
Tree supporting box Pedunculate Oak Pedunculate Oak
20 August 2011 Empty Empty
17 November 2013 Droppings Droppings
12 October 2014 1♂ SPip Empty

All Saint's Boxes

Box No. >>>> 26 27 28 H
Box type - ent. aspect 2FN - SE aspect 2FN - ENE aspect 2FN 1FF - aspect
Height of box 4 metres 4 metres 5 metres metres
Tree supporting box Scot's Pine Scot's Pine Scot's Pine  
20 August 2011 Empty Empty Empty 4 SPip
17 November 2013 Empty Empty Empty Not checked
12 OCtober 2014 Empty Empty Empty Missing?

Updated 26 April 2015