Hummingbirds are birds which belong to the biological family Trochilidae and are native to North and South America. They are the smallest of birds as most the size of the species varies from 7.5–13 cm, that is, 3–5 inches in length. The smallest extant bird species is 5 cm or 2.0 inches in size and is known as bee hummingbird, which weighs less than even 2.0 g. They are called hummingbirds because of the humming sound that is generated by their beating wings, which flap at frequencies high enough to be audible to humans. They hover in mid-air at rapid rates of flapping their wings, which vary from about 12 beats per second in the largest species, to 80 excess in some of the smallest. Their top speeds exceed 15 m/s or 54 km/h (34 mph) out of those species that have been measured in wind tunnels. Apart from that, some species can even dive at speeds in excess of 22 m/s or 79 km/h (49 mph). Hummingbirds, out of all the homeothermic animals, have the highest mass-specific metabolic rate. To conserve energy in scarcity of food, and nightly when not foraging, they can go into a state similar to hibernation called torpor, slowing their metabolic rate to 1/15th of its normal rate.

In this sub category you can download free PNG images: Hummingbird Animals. In this category "Hummingbird" we have 114 free PNG images with transparent background.

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  Watercolor Hummingbird Free Photo
  Format: PNG
  Resolution: 733x491
  Size: 237.4KB
  Downloads: 94
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  Silhouette Black Hummingbird Free HD Image
  Format: PNG
  Resolution: 960x703
  Size: 31.8KB
  Downloads: 93
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  Flying Hummingbird Download HQ
  Format: PNG
  Resolution: 3082x2031
  Size: 1.3MB
  Downloads: 93
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  Photos Silhouette Hummingbird Free Download PNG HD
  Format: PNG
  Resolution: 1296x750
  Size: 118.6KB
  Downloads: 93
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  Photos Flying Black Hummingbird Free Photo
  Format: PNG
  Resolution: 512x512
  Size: 28.4KB
  Downloads: 92
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  Silhouette Black Hummingbird Free Download PNG HD
  Format: PNG
  Resolution: 512x512
  Size: 4.3KB
  Downloads: 92
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  Flying Hummingbird Download HD
  Format: PNG
  Resolution: 800x450
  Size: 227.8KB
  Downloads: 92
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  Flying Black Hummingbird Download HQ
  Format: PNG
  Resolution: 1769x1265
  Size: 47.4KB
  Downloads: 91
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  Watercolor Photos Flying Hummingbird PNG Download Free
  Format: PNG
  Resolution: 1800x1800
  Size: 1.8MB
  Downloads: 91
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  Silhouette Hummingbird HD Image Free
  Format: PNG
  Resolution: 800x475
  Size: 4.8KB
  Downloads: 91
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  Flying Hummingbird Free Download PNG HD
  Format: PNG
  Resolution: 600x630
  Size: 264.5KB
  Downloads: 90
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  Flying Silhouette Hummingbird Free Clipart HD
  Format: PNG
  Resolution: 1015x532
  Size: 10.1KB
  Downloads: 90
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  Watercolor Flying Hummingbird Free Download PNG HQ
  Format: PNG
  Resolution: 1630x1296
  Size: 1.1MB
  Downloads: 90
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  Flying Hummingbird Free Download PNG HQ
  Format: PNG
  Resolution: 1630x1296
  Size: 1.1MB
  Downloads: 89
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  Turquoise Flying Hummingbird Free PNG HQ
  Format: PNG
  Resolution: 715x653
  Size: 195.4KB
  Downloads: 89
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  Watercolor Flower Hummingbird HQ Image Free
  Format: PNG
  Resolution: 550x481
  Size: 200.2KB
  Downloads: 88
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  Flying Silhouette Hummingbird Free HD Image
  Format: PNG
  Resolution: 2286x1758
  Size: 36.2KB
  Downloads: 88
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  Watercolor Flying Hummingbird Free Transparent Image HD
  Format: PNG
  Resolution: 512x337
  Size: 59.8KB
  Downloads: 88
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  Silhouette Hummingbird Download HQ
  Format: PNG
  Resolution: 512x512
  Size: 417.4KB
  Downloads: 88
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  Flying Black Hummingbird Free HQ Image
  Format: PNG
  Resolution: 2217x1673
  Size: 40.0KB
  Downloads: 87

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