Birds (class Aves) are winged, bipedal, endothermic (warm-blooded), egg-laying, vertebrate animals. There are around 10,000 living species, making them the most numerous tetrapod vertebrates. They inhabit ecosystems across the globe, from the Arctic to the Antarctic. Extant birds range in size from the 5 cm (2 in) Bee Hummingbird to the 3 m (10 ft) Ostrich. The fossil record indicates that birds evolved from theropod dinosaurs during the Jurassic period, around 150–200 Ma (million years ago), and the earliest known bird is the Late Jurassic Archaeopteryx, c 150–145 Ma. Most paleontologists regard birds as the only clade of dinosaurs to have survived the Cretaceous–Tertiary extinction event approximately 65.5 Ma.
* This design is also available on our MENS T-Shirt!
• 4.5 oz. SoftStyle
• 100% Ringspun Cotton
• See SIZING CHART
These shirts are cut to be more fitted than standard t-shirts.
Because they're 100% cotton, you can expect them to shrink a bit.
If in doubt, it might be best to order a larger size.