Dull in appearance but notable for its effervescent song, the house wren is a common summer inhabitant of scrublands and woodland edges throughout much of North America. Variation in plumage and ...

Vocal and plumage variation in the Bewick’s wren ... Where populations of the eastern subspecies-group overlap with Carolina wren, confusion possible. However, Bewick’s is not as brightly ...

In this page, you will learn about variation within gene pools, as well as the ways in which this variation can be an advantage to populations of organisms.

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This is because modern humans haven't been around long enough to evolve into different subspecies and we've ... Eighty-five percent of all human variation can be found in any local population ...

Among the species viewed there recently: white-throated swift, crissal thrasher, rock wren, phainopepla, juniper titmouse, spotted towhee, cactus wren, house finch and Woodhouse scrub-jay.

However, an important paper by Fondon and Garner (2004) suggests that there is yet another source of variation: tandem repeats. Tandem repeats are short lengths of DNA that are repeated multiple ...

Cactus Wren Elementary School is a public school located in Phoenix, AZ, which is in a large city setting. The student population of Cactus Wren Elementary School is 399 and the school serves K-6.

This vegetation provides good cover for its favorite prey and also shields it from larger birds of prey. RANGE: Cactus ferruginous pygmy owls live in the desert habitat of southern Arizona and in ...

Those include bird species — Least Bell's Vireo and coastal cactus wren — and Western spadefoot, an amphibian sometimes referred to as a toad that the U.S. Fish & Wildlife Services is ...

DESCRIPTION: The Florida semaphore is a tree-like cactus with a distinct trunk and a cluster of spines at the top. The cactus has a dull-gray, fleshy stem with shrubby branches that can grow to a ...