Photography of Birds – Set # 93

Set # 93

Common Grackle

Common Grackle

Common Grackle

In the breeding season, males tip their heads back and fluff up feathers to display and keep other males away. This same behavior is used as a defensive posture to attempt to intimidate predators. Male common grackles are less aggressive toward one another, and more cooperative and social, than the larger boat-tailed grackle species.

Red-winged Blackbird  (M)

Red-winged Blackbird (M)

Red-winged Blackbird (M)

Complete replacement of wing feathers takes about eight weeks. However, birds in their first year of age frequently retain some of the under-wing coverts and juvenile tertiary remiges after post-juvenile molting. Of seventy immature males examined during the last week of October, it retained 70% some older lower primary blankets. In most cases where partial replacement of the cover feathers occurs, it is the proximal covers that the bird retains.

© HJ Ruiz – Avian101

10 thoughts on “Photography of Birds – Set # 93

  1. I enjoyed both photos and the info, too, HJ. Stunning grackle photo. I didn’t know the common grackles were less aggressive to one another than the boat-tailed, interesting. Wonderful post.

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