Hi, I'm Andrew and I’m just a simple 19 year old guy and zoology student that posts random factoids about obscure animals and general animal science/zoology/biology stuff so if you like animals this is the place for you, if you only like cute animals this is not the place for you… Also I can ID any animals you might need identified (just submit them to me).

Disclamer: none of the pictures are mine unless stated

Family Polioptilidae: A family of passerine birds commonly known as "Gnatcatchers". All gnatcatchers are native to the New World, being found in both North and South America. Gnatcatchers are close relatives of the wrens and some species are known as "Gnatwrens".

Image: Erikwlyon


Why fly?

part 2: the ground up hypothesis

Now that you known about bird flight and the trees down hypothesis. It is now time to talk about the second hypothesis, the ground up hypothesis. The ground up hypothesis states that early birds did not live in the trees but were ground runners, these runners probably used their wings for balance when running and eventually these wings of balance turned into wings that could glide. Some other scientists suggest that wings evolved in an arms races of display as early birds with stronger wings and longer feathers would be more likely to mate. A secondary hypothesis is the WAIR hypothesis. WAIR stands for wing-assisted incline running, during WAIR the bird uses its wings to help the bird quickly run up a steep slope like a tree trunk to help escape a potential predator. However early birds did not have the shoulder muscles needed for this and WAIRs validity is put into question.

further reading

Image source

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    The Sideways Hypothesis: Wings developed to catch prey in forested terrain. Small theropods preying on fast moving...
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