May arrives and migration ends

Gray Catbird and contopus flycatchers seem to be the last of this year’s migrants here on the Turrialba Volcano slope. I have been keeping careful records for some 10 years now and I find that as the month of May arrives northern migrant sightings are very scarce.

Oriole, Baltimore male Santa Rosa garden (1)

Common but beautiful: the male Baltimore Oriole (Icterus galbula); photo by John Beer, taken in nearby Santa Rosa de Turrialba

Golden-winged Warbler male Calle Vargas

Not so common, but still easily found here: A male Golden-winged Warbler (Vermivora chrysoptera) photographed by Larry Waddell a little higher up the mountain slope at Calle Vargas

The following table shows latest departure dates for San Antonio’s commonest northern migrants since 2009, compared with this year’s departures. My data are too sparse to be meaningful for the many other migrants that visit our area.

  1.  Barn Swallow                                            May 10            April 28, 2017
  2.  Olive-sided Flycatcher                             May 1              April 25, 2017
  3.  Western Wood-Pewee                             May 9               May 6, 2017
  4.  Swainson’s Thrush                                   April 18           April 1, 2017
  5.  Yellow-throated Vireo                             April 23           April 13, 2017
  6.  Philadelphia Vireo                                   April 15           March 24, 2017
  7.  Red-eyed Vireo                                         May 9               March 25, 2017
  8.  Golden-winged Warbler                         April 18           April 8, 2017
  9.  Black-and-white Warbler                       April 19           March 24, 2017
  10.  Tennessee Warbler                                  May 5               April 21, 2017
  11.  Yellow Warbler                                         May 12             April 26, 2017
  12. Mourning Warbler                                    April 24           April 15, 2017
  13. Chestnut-sided Warbler                           April 19           April 17, 2017
  14. Black-throated Green Warbler               April 26           April 15, 2017
  15. Wilson’s Warbler                                       April 11           April 17, 2017*
  16. Rose-breasted Grosbeak                           April 10           March 12, 2017
  17. Summer Tanager                                        April 23          April 9, 2017
  18. Baltimore Oriole                                         April 25          April 21, 2017
  • = New late date

Today is May 8. Let’s see if anything else shows up in the coming weeks.

 

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