Calvert Bluebird Council Yearly Trail Data Summary


Graph based on original created by Chris Crunkleton.

YEAR    Boxes    Nests   Eggs    Hatchlings Fledglings  Survival Rate
 2024 431  572 2292   1874  `671 0.73
2023 452   574 2319   1925  1775 0 .77
2022   423 492  1967  1696  1547  0.79 
2021  350  404  1545  1288  1185  0.77 
2020  345   410  1551 1253   1128 0 .73
2019  386 378  1464 1230 1167 0.80 
 2018  396 296 1180 1024 969 0.82
2017 (g) 331  330  1432 1177  1058  0.74 
 2016 (f) 332 232  991   829 761  0 .77
2015  309 158 654 517 554 0.85
 2014 (e) 314   340  1312 1053 889  0.68
 2013 260  262  1050   891 805  0.77
 2012 (d) 241 259   1030  787 736 0.71 
 2011 (c) 196       585  
 2010 183  201  819  631  577 0 .70
 2009 271  351  1194  967  869 0.73 
 2008 240  276  992  775  684 0.69 
 2007 225  195  761  619  534 0.70 
 2006 246  181  707  584  540 0.76 
 2005 (b) 133  65  252  221  179 0 .71
 2004 266  153  525  365  352 0 .67
 2003 (a) 294  107  343  255  223 0.65 
 2002 294  432  1518  1027  867 0 .57
 2001 343  439  1641  1138  1041 0.63 
 2000 360  416  1544  1132  1010 0 .65
 1999 369  449  1521  1133  1045 0.69 

a Winter 2002-03 took a severe toll on bluebirds in Calvert County
b No data received from Jefferson Patterson Park trail in 2005
c No data for 2011 other than number of boxes and fledglings
d No data received from Twin Shields and Chesapeake Hills golf courses in 2012
e No data received from Chesapeake Hills Golf Course or Mill Creek Middle School; a new trail at Ward Road property was added
f No date from the Industrial Park or the Fair Grounds; Chesapeake Hills Golf Course closed. 
g Four additional trails added in 2017