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Swallow


Swallow
Photo Information
Copyright: Jo Ottey (jo8) Silver Note Writer [C: 1 W: 0 N: 14] (101)
Genre: Animals
Medium: Color
Date Taken: 2009-10-12
Categories: Birds
Camera: Canon 20D, Canon EF 70-300mm F4.5-5.6 DO IS USM
Exposure: f/7.1, 1/500 seconds
More Photo Info: [view]
Photo Version: Original Version
Date Submitted: 2009-10-22 22:24
Viewed: 3746
Points: 2
[Note Guidelines] Photographer's Note
Swallows are a group of passerine birds in the family Hirundinidae which are characterised by their adaptation to aerial feeding.

This family comprises two subfamilies: Pseudochelidoninae (the river martins of the genus Pseudochelidon) and Hirundininae (all other swallows and martins). Within the Hirundiniae, the name "martin" tends to be used for the squarer-tailed species, and the name "swallow" for the more fork-tailed species; however, there is no scientific distinction between these two groups. The family contains around 83 species in 19 genera.

Swallows have adapted to hunting insects on the wing by developing a slender streamlined body and long pointed wings, which allow great maneuverability and endurance, as well as frequent periods of gliding. Their body shape allows for very efficient flight, which costs 50-75% less for swallows than equivalent passerines of the same size. Swallows usually forage at around 3040 km/h, although they are capable of reaching speeds of between 5065 km/h when traveling.

The chicks hatch naked and with closed eyes. Fledged juveniles usually appear as duller versions of the adult.

The family uses a wide range of habitats. They are dependent on flying insects and as these are common over waterways and lakes they will frequently feed over these, but they can be found in any open habitat including grasslands, open woodland, savanna, marshes, mangroves and scrubland, from sea level to high alpine areas.

info from - http://en.wikipedia.org/wiki/Swallow


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Critiques [Translate]

so funny the position of this interesting specie, that has very nice colors

greetings
matteo

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