Nest Box 21
There are three main cavity nesting species here at the James Reserve:
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Violet-green swallow tend to have a clutch size between 4 to 7 eggs. It will take 14 - 15 days for the eggs to hatch once the mother starts incubating the eggs. Some eggs may not hatch because one of the parents is infertile, poor incubation (common with young females with little incubating experience) or the egg shell is week. Once the eggs hatch the young birds will not fledge from the nest for 16 to 22 days. If the food source is in plenty a violet-green swallow pair can produce a 2nd brood in the same nesting season.
Western Bluebirds tend to have a clutch size between 4 to 6 eggs. It will take 13 - 14 days for the eggs to hatch once the mother starts incubating the eggs. Some eggs may not hatch because one of the parents is infertile, poor incubation (common with young females with little incubating experience) or the egg shell is week. Once the eggs hatch the young birds will not fledge from the nest for 17 to 22 days. If the food source is in plenty a western bluebird pair can produce a 2nd brood in the same nesting season.
Mountain chickadee tend to have a clutch size between 5 to 9 eggs. It will take 14 - 15 days for the eggs to hatch once the mother starts incubating the eggs which begins with the laying of the penultimate, or next to last, egg. Nests are made of moss, bark, fur, plant fibers, and feathers. Once the eggs hatch the young birds will not fledge from the nest for 19 to 21 days.
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Nestbox 21 |
Start Date |
End Date |
| Nest Building |
10 days |
6/1 |
6/11 |
| Clutch Size |
3 eggs |
6/1 |
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| Days of Incubation |
- days |
- |
- |
| Number of Eggs Hatched |
- eggs |
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| Days to Fledge After Eggs Hatch |
- days |
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| 2007 Nesting Season |
| Information: |
| 10/21/06 - Western Bluebird begins sleeping in box, intermittently
(approximately 1/3 of the nights through April '07) |
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| 4/29/07 - Light grass nest building, activity ceases after
2 days |
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| 2006 Nesting Season |
| Information: |
2/6/06-4/30/06 - pair of bluebirds now are roosting overnight
in the nest box
3/14/06 - Empty at night |
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3/18/06 - Only single bird roosting
4/16/06 - Empty at night |
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| 5/1/06 - Nest building begins |
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| Both male and female still roosting in box at night |
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| 5/18/06 - 1st Egg laid between 8 AM - 8:30 AM |
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| 5/21/06 - 4th Egg laid |
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| 6/4/06 - 1st Egg hatched (only 1 egg of the 4 will hatch) |
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| 6/23/06 - Lone chick dissapears after 6:15 PM, not clear why
(observed no signs of fledging) |
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| Western Bluebird |
Nestbox 21 |
Start Date |
End Date |
| Nest Building |
18 days |
5/1 |
5/18 |
| Clutch Size |
4 eggs |
5/18 |
5/21 |
| Days of Incubation |
15 days |
5/21 |
6/4 |
| Number of Eggs Hatched |
1egg |
6/4 |
6/4 |
| Days to Fledge After Eggs Hatch |
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6/4 |
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| 2005 Nesting Season |
| Information: |
| 7/1/05 - A Nuttall's woodpecker moved into the empty box. |
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| 11/30/05-2/6/06 - Single western bluebird has been roosting
in box off and on. |
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| 2005 Nesting Season |
| Information: |
| From very early in April we had a male and female roosting
in the nestbox at night |
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| 4/17/05 - Nest building began very slowly. Possibly just beddingfor
night time roosting. |
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| 4/27/05 - Active nest building began. |
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| 5/14/05 - The first egg is laid |
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| 5/18/05 - Total of 5 eggs laid |
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| 5/31/05 - The first eggs hatched |
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| 6/1/05 - Parents are busy feeding thier chicks |
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| 6/19/05 - Chicks getting ready to leave soon |
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| 6/21/05 - All 4 chicks fledge |
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| Western Bluebird |
Nestbox 21 |
Start Date |
End Date |
| Nest Building |
27 days |
4/17 |
5/14 |
| Clutch Size |
5 eggs |
5/14 |
5/18 |
| Days of Incubation |
14 days |
5/18 |
5/31 |
| Number of Eggs Hatched |
4 eggs |
5/31 |
6/1 |
| Days to Fledge After Eggs Hatch |
22 days |
5/31 |
6/21 |
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| 2004 Nesting Season |
| No activity |
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| 2003 Nesting Season |
| Western Bluebird |
Nestbox 21 |
Start Date |
End Date |
| Nest Building |
32 days |
4/20 |
5/21 |
| Clutch Size |
3 eggs |
5/21 |
5/24 |
Days of Incubation |
14 days |
5/24 |
6/7 |
| Number of Eggs Hatched |
3 eggs |
6/7 |
6/7 |
| Days to Fledge After Eggs Hatch |
21 days |
6/7 |
6/28 |
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| Nest Box Information |
| Box Number |
21 |
| UTM Northing |
3741024 |
| UTM Easting |
520866 |
| GPS waypoint |
8 |
| mounting location |
metal pole |
| aspect |
flat |
| box age |
2000 |
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| design (door, material) |
side cedar |
| box floor width |
6 in. |
| box floor length |
6 in. |
| Box height |
4' 6" |
| hole direction |
290° |
| hole size |
1.5 in. |
| height of hole above floor |
7.5 in. |
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