Bird Songs

Almost all bird songs are unique to their species. They are conserved over generations with very little or no variation at all. Cross species song learning is shown to be infective. So both genetics and environment are key for the hereditary transfer of the songs.  The brown thrusher can sing up to 2,000 distinct songs.

A still from Happy feet                                  Source: Wikipedia

As shown in Happy feet, each species have unique song and even little variations are not accepted by peers. 

Special effects:

These songs can also be accompanied with other actions for more impact. 

Western Sandpiper                                          Source: Wikipedia

Western Sandpipers are known for their display flights accompanied with their song. 

A woodpecker drums on a tree while singing. A Ruffled grouse thumps his wings to produce special effects to his song.

Why do they sing?

Though the purpose of these songs can be species specific, they are mostly used to impress mates and proclaim territories.

Who sings?

According to a study, in North America mostly males sing these songs. But in tropics, duets are more common.

Bird on campus:

Not all crows are same!! 

Indian House Crow                                       Source: Wikipedia

 Indian House Crow: Grey neck and smaller size separates it from Jungle crow

Indian Jungle Crow                                       Source: Wikipedia

Indian Jungle Crow: A glossy jet black crow smaller than common Raven

Common Raven                                            Source: Wikipedia

Common Raven: Common Raven is larger than a typical jungle crow and is not so common across subcontinent. It is found usually in desert part of NW India and along Himalayan region.

So next time you see a crow remember that they are all not same!!!