Historical Eastern North Pacific Gray Whale Cow/Calf Counts

The Cetacean Health and Life History Program with the Marine Mammal Division at Southwest Fisheries Science Center has been monitoring the northbound migration of gray whale cows with calves since 1994 at Piedras Blancas. The counts of cows with calves is highly variable as shown on the graphs below. For additional information, visit our web page on the Survey of Northward Migrating Gray Whales. For the counts from the current field season, visit our web page for the 2015 Gray Whale Cow/Calf Counts. Please note: The numbers shown below are the actual counts and have not been adjusted for effort. 

  • Historical Counts: 1994 through 2014
  • 2014 Gray Whale Cow/Calf Counts
  • 2013 Gray Whale Cow/Calf Counts
  • 2012 Gray Whale Cow/Calf Counts
  • 2011 Gray Whale Cow/Calf Counts

Historical Counts of Gray Whale Cow/Calf Piars, 1994 through 2014

Figure 1. Number of gray/whale cow/calf pairs counted between 1994 and 2014. 


  Gray Whale Cow/Calf Counts for 2014 by Week

 Figure 2. Number of gray/whale cow/calf pairs counted in 2014.

Gray Whale Cow/Calf Counts for 2013 by Week

Figure 3. Number of gray/whale cow/calf pairs counted in 2013.

Gray Whale Cow/Calf Counts for 2012 by Week

Figure 4. Number of gray/whale cow/calf pairs counted in 2012.

Gray Whale Cow/Calf Counts for 2011 by Week

Figure 5. Number of gray/whale cow/calf pairs counted in 2011.


Last modified: 4/3/2015