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8_murik_8 [283]
3 years ago
10

How does sexual selection affect evolution of widowbirds?

Biology
1 answer:
Gnesinka [82]3 years ago
7 0

Explanation:

according according to slideplayer.com better made sexual selection is driven by sex differences in reproductive rate.

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Posted January 22

INCREASE FONT SIZE

Birding: Annual bird counts include interesting lingerers

Warmer York County especially holds a range of seasonal holdovers in the Christmas Bird Counts.

BY HERB WILSON

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The 117th Christmas Bird Count is now over. As usual in January, I will discuss the highlights of some of the Maine counts. These standardized censuses provide an important tool to monitor the abundance of winter birds throughout North America and beyond.

I’ll concentrate on changes in regularly wintering birds, the arrival of unpredictable invaders and records of lingering birds whose wintering areas are well to our south. A rarity or two may pop up as well.

We’ll start with the southern Maine coast. The York County count was held on Dec. 21. Thirty observers found 82 species of birds.

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