Archive for August 3rd, 2008

Nature photos

Common Whitetail

A beautiful specimen of a female Common Whitetail dragonfly (Plathemis lydia), taken yesterday at Sandy Point State Park:

More detailed, original image here. The females can be distinguished by having three black patches on their wings, while the males only have one, larger patch. This page shows many examples of the different sexes.
The mature males of [...]

03 Aug 2008 Samuel Huckins 0 comments

Biology

Phylogenetic Supertrees

Phylogenetic trees are tree-like diagrams showing the relationships among a group of creatures, often with their most recent common ancestor serving as the base of the trunk (rooted versus unrooted). They illustrate how groups of organisms originated, divided, and endured or died off over time. An example of a very low resolution (i.e. only showing [...]

03 Aug 2008 Samuel Huckins 0 comments