<text>endNodeFollowing this path will present you with an introduction to owls.Some of the information will be about birds in general, such as topographical features and feather anatomy. Other information will be specific to owls.Please explore further if you have time.endNodeHere are the general topographical features of a bird.Of course, not all these features are present on all birds.Owls also have other distinguishing features - most notably large eyes and often ear tufts.endNodeHere we see introductory information about owls, as well as about other bird types.endNodeNote the lack of ear tufts on this owl.endNodeNote the lack of ear tufts in this owl.endNodeendNodeTo hear the screech Owl, click on the words "Screech Owl" at the top right of this card.Click on the picture to get information about the Screech Owl.endNodeTo compare the voice of the Screech Owl to the New Zealand Tui, click on the Voice button at the middle left of this card.Ignore the rest of the information on this card.endNodeendNodeNote the two different areas of the vane - the pennaceous portion and the plumulaceous portion. They have different functions.endNodeClick on the information button at the lower left of this card to see more information about the function of the down feathers.endNodeHere we see some Hawk chicks with the soft down characteristic of chicks.As chicks become older, the feathers must develop and become stronger to enable the bird to fly.endNodeendNodeHere we see the properties of wings that enable flight to occur.Note that it is the curved upper surface of the wing that enables flight to occur due to the change in pressure as the air speeds over it.See the Bernouilli's Law explanation for further details.endNodeNote the explanation of "aspect ratio" at the lower right.endNode</text>
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