I have an Excel spreadsheet that I use to track whatever information I can find about the Harrisburg falcons, and any nests that one of the Harrisburg offspring is found at. Since I only learned of them in 2005, I I have had difficulty tracking down information from previous years, so my spreadsheet is not quite comprehensive. But now that there are 6 Harrisburg fledges out there successfully nesting elsewhere, I thought a summation of what I do know might be appropriate.
Since the nest ledge at the Rachel Carson building was first occupied in 1997:
Number of resident males: 2
Number of resident females: 4
Number of eggs laid: 61
Number of eggs hatched: 51
Number of male offspring: 20
Heaviest male:* 690 g (2 chicks tied: Lil Man and White 2010) incomplete info
Lightest male:* 485 g (Yellow 2007) incomplete info
Number of female offspring: 30
Heaviest female:* 990 g (Red 2013) incomplete info
Lightest female:* 550 g (Red 2007) incomplete info
Number of undetermined sex: 1 (Silver 2006, 500 g)
Number of birds fledged: 49
Number of birds rescued:* 27 incomplete info
Number of overall rescues:* 38 (19 x 1, 5 x 2, 3 x 3) incomplete info
Number of offspring dispersed: 33 (does not include this year’s 4, as they have not yet dispersed)
Number of offspring known deceased: 16 (includes fledglings that vanished without a trace shortly after fledging)
Of known deceased, 12 died during nestling or fledgling phase, 2 vanished without a trace within days after fledging, and 2 died after dispersal but during first year of life.
Offspring with nests: 6
Number of chicks produced so far at offspring nests*: 68 (Yellow Boy 2005: 23; Yellow Girl 2006: 15*; Red Girl 2008: 13; Green Girl 2009: 7; Blue Girl 2009: 7; Silver Boy 2011: 3)
*Incomplete information
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