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Dinesh

Dinesh club

Posted: 27 Jul 2020

Taken: 21 Jun 2009

2 favorites     4 comments    103 visits

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Michigan •
Delta township •
Excerpt •
Why Evolution is True •
Author •
Jerry Coyne •
PIP •

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103 visits

Defending the territory

Defending the territory

Jeff Farley, neira-Dan have particularly liked this photo

Comments
 Dinesh
Dinesh club
The red-winged blackbird of North America defends territories in open habitats, usually freshwater marshes. . . . . Besides direct patrolling, redwing males defend their territories by singing complex songs and making threat displays with their eponymous ornament, a bright red epaulet on the shoulder. (Females are brown, sometimes with a small vestigial epaulet). The epaulets aren’t there for attrach females -- rather, they are used to threaten other males in the battle for territories. . . . The epaulets probably keep intruders away bty signaling that a territory is occupied. Song is also important. Muted males, temporarily deprived of their ability to sing, also lose territories.

The blackbirds, the, song and plumage helps a male get more mates. In the studies described above, and many others as well, researchers have shown that sexual selection is acting because males with more elaborate features get a greater payoff in offspring. This conclusion seems simple but required hundreds of hours of tedious fieldwork by inquisitive biologists….. Page 151

Excerpt from

WHY EVOLUTION IS TRUE
5 years ago. Edited 5 years ago.
 neira-Dan
neira-Dan club
Wow !! Quelle merveilleuse capture
5 years ago.
 neira-Dan
neira-Dan club
+++++++++++++++
5 years ago.
 Jeff Farley
Jeff Farley
An excellent capture Dinesh.
Stay safe and thankyou for posting to FFF.
5 years ago.

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