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Table 1 Number of giraffes including age (year-month), year of data collection and total recording time for each institution

From: Nocturnal “humming” vocalizations: adding a piece to the puzzle of giraffe vocal communication

Study site Giraffe species Year, month N Males Females Rec time (hh:mm:ss)
Adult Subadult Young Newborn (months) Adult Subadult Young Newborn
Berlin Tierpark Giraffa c. rothschildi 2011, Oct 11 21 Years 5 months   1 Year 1 month 2 24 Years 5 months 1 Year 8 months    135:21:39
        12 Years 2 months    
         9 Years 4 months    
         8 Years 2 months    
         4 Years 7 months    
         4 Years 2 months    
   2012, Nov 9 22 Years 6 months   1 Year 3 months   13 Years 3 months    5 Months 109:10:00
         10 Years 5 months    4 Months
         9 Years 3 months    
         5 Years 8 months    
         5 Years 3 months    
   2014, Apr 8   2 Years 9 months   5 14 Years 9 months     336:01:24
        0 11 Years 11 months    
         10 Years 8 months    
         7 Years 2 months    
         6 Years 8 months    
Copenhagen Zoo Giraffa c. reticulata Mar, 2014 7 7 Years 11 months    4 7 Years 7 months 1 Year 9 months 8 Months   107:58:53
         7 Years 8 months    
         10 Years 8 months    
Vienna Zoo Giraffa c. rothschildi Apr, 2014 4 20 Years 9 months   9 Months   17 Years     144:24:17
         8 Years 6 months    
   Oct − Dec, 2007 4 14 Years 3 months    1 8 Years 6 months     114:16:13
         2 Years    
  1. Age classification based on Le Pendu et al. [44]: newborn: <6 months; young: 6–18 months; subadult: 18 months to 4 years; adult: >4 years