Seasonal trend in movement directions at dawn and dusk: A study on crow and white herons

Raj Kumar, Devraj Singh, Sangeeta Rani, Shalie Malik

Research output: Contribution to journalArticlepeer-review

1 Scopus citations


Crows (Corvus splendens) and white herons (Ardea alba) inhabit the agricultural landscapes nearby human habitats which represent dynamic ecosystem and show seasonal crop patterns. We studied the movement pattern in these birds at dawn and dusk, during solstices (December and June) and equinoxes (March and September). The movement directions were changed from uniform at dawn to a concentrated distribution at dusk all along the season suggesting that morning movements are more exploratory than evening with seasonal differences. Differential use of directions in December than June could be the effect of temperature, food availability or wind direction and speed. During breeding, less number of directions used suggests that birds might be moving towards the directions having high probability of food availability. It is likely that avian dispersal in space and time is dependent on the food availability however, further studies are required to be carried out.

Original languageEnglish
Pages (from-to)553-559
Number of pages7
JournalBiological Rhythm Research
Issue number4
StatePublished - Jul 3 2016

Bibliographical note

Publisher Copyright:
© 2016 Informa UK Limited, trading as Taylor & Francis Group.


  • Dawn
  • crow
  • direction
  • dusk
  • movement
  • white heron

ASJC Scopus subject areas

  • Ecology, Evolution, Behavior and Systematics
  • Physiology
  • Physiology (medical)


Dive into the research topics of 'Seasonal trend in movement directions at dawn and dusk: A study on crow and white herons'. Together they form a unique fingerprint.

Cite this