What is a Season Summary sheet?
  • A Season Summary reports a set of important nesting statistics describing the
    combined reproductive success of the Tree Swallows at your project that year.  
    Click link to see an example and also see example below.  
  • Summaries usually also include a narrative or list of situations or events that
    occurred that season which may have influenced nesting and should be
    recorded for future reference.  
  • Obviously, Season Summaries are compiled after the season is completed.

The Season Summary sheet offered here includes the following fields:
  • Boxes and Nesting Attempts:
    Number of boxes available
    Number of Boxes Used
    Percent of Boxes Used
    Number of Nesting Attempts (boxes may have more than one)
  • Eggs:
    First egg date at the project
    Number laid
    Average clutch size
    Clutch Range (from lowest number to highest number of eggs
    Clutch Mode (most common number of eggs)
  • Nestlings:
    Total number of eggs that hatched
    Percent of eggs that hatched
    Causes of egg mortality (takeovers, thrown out, broken, unknown)
    Average brood size (young per nest at hatch)
    Brood Range at hatch (from lowest to highest number of young)
    Brood Mode at hatch (most common number of young)
    Number of living nestlings on day 12
    Average brood at day 12
    Brood Range at day 12
    Brood Mode at day 12
  • Fledging:
    Number of nestlings that fledged
    Percent of eggs laid that fledged
    Percent of nestlings hatched that fledged
    Causes of nestling mortality when known
  • Weather Factors:  
    Brief summary of weather trends during nesting.
  • Other/Remarks:  Whatever else you want to add regarding the season.  This
    could be unusual events or behaviors, different things you tried to improve the
    project, issues you explored or dealt with, etc.

Learn About Birds at Tree Swallow Nest Box Projects
Season Summaries
for Tree Swallow Projects