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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  Photos Silhouette Hummingbird Free Download PNG HD
  Format: PNG
  Resolution: 1296x750
  Size: 118.6KB
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  Turquoise Flying Hummingbird PNG Download Free
  Format: PNG
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  Size: 1.1MB
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  Format: PNG
  Resolution: 719x566
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  Flying Vector Hummingbird Free HQ Image
  Format: PNG
  Resolution: 512x512
  Size: 4.6KB
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  Format: PNG
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  Flying Vector Photos Hummingbird PNG Free Photo
  Format: PNG
  Resolution: 3552x2909
  Size: 287.9KB
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  Watercolor Hummingbird Free Clipart HQ
  Format: PNG
  Resolution: 1200x1200
  Size: 553.6KB
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  Hummingbird Tattoos Picture
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  Hummingbird Tattoos Free Download Png
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  Hummingbird Transparent
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  Resolution: 386x377
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  Hummingbird Png Image
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  Resolution: 671x700
  Size: 194.6KB
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  Flying Black Hummingbird Download HQ
  Format: PNG
  Resolution: 1769x1265
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  Flying Black Hummingbird Free HQ Image
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  Size: 40.0KB
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  Photos Flying Black Hummingbird Free Photo
  Format: PNG
  Resolution: 512x512
  Size: 28.4KB
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  Flying Black Hummingbird Free PNG HQ
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  Resolution: 1027x631
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  Flying Black Hummingbird Download HQ
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  Size: 29.8KB
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  Silhouette Black Hummingbird Free Download PNG HD
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  Size: 4.3KB
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  Flying Colorful Hummingbird Free Transparent Image HQ
  Format: PNG
  Resolution: 1024x1024
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  Flying Colorful Hummingbird PNG File HD
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  Resolution: 900x1355
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  Photos Flying Colorful Hummingbird Download Free Image
  Format: PNG
  Resolution: 1144x1517
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