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 Eras of Life
 Dinosaur Evolution
 Feathered Dinosaurs

Species

 Compsognathidae

MYA
   Compsognathus

150

   Sinosauropteryx

130

 Therizinosauroidea
   Beipiaosaurus

130

   Falcarius

125

   Alxasaurus

112

   Erlikosaurus

95

   Therizinosaurus

75

 Oviraptoridae
   Caudipteryx

140

   Insicivosaurus

120

   Avimimus

95

   Chirostenotes

70

   Rinchenia

70

   Nomingia

68

   Oviraptor

67

 Dromaeosauridae
   Microraptor

126

   Deinonychus

120

   Buitreraptor

90

   Unenlagia

90

   Bambiraptor

80

   Atrociraptor

70

   Dromaeosaurus

70

   Velociraptor

67

 Tyrannosauridae
   Dilong

130

 Troodontidae
   Mei long

130

   Sinornithoides

105

   Troodon

 67

 Alvarezsauridae
  Patagonykus 95
  Shuvuuia 80
  Alvarezsaurus 80
  Parvicursor 80
  Mononykus 70
 Aves (birds)
   Protarchaeopteryx

135

   Archaeopteryx

147

  Recent Discoveries
  Juraventor Starki

Information

 Tyrannosaurs
 Weird Dinosaurs
 Prehistoric Sea Monsters
 Pterosaurs
 Sauropods

 

 

Aves (birds)
   Birds are bipedal, warm-blooded, egg-laying vertebrates traditionally characterized by the presence of feathers.  Their forelimbs are wings.  They have hollow bones.  They vary in size from tiny hummingbirds to the huge Ostriches.  Authorities disagree as to classification.  Some maintain that some birds are varieties or subspecies of another while others maintain they are separate species.  Depending on which system is used, there are between 8,800 and 10,200 living species. Another 120 to 130 have become extinct over the past few centuries. 
  They show tremendous diversity.  Most are active during the day, but others are active at night.  Still others prefer the twilight hours.  They have filled a great many ecological niches and different species have different diets.  Birds feed on plants, seeds, nectar, insects, small mammals, fish, carrion and even other birds.  Most life on land, but others spend almost all their time at sea.  Many frequent ocean shores, while others live around rivers, lakes and ponds.  Some birds migrate long distances and some can stay aloft for days at a time.  No other vertebrate has demonstrated such great flexibility or enjoyed such great success.
   Recent fossil discoveries have revealed that many dinosaurs had bird characteristics, such feathers, hollow bones and beaks.  Other fossils reveal bird behavior, such as brooding and sleeping positions.  Today scientists are in almost universal agreement that birds descended from the dinosaurs.
Archaeopteryx lithographica - 150-148 MYA
   The Archaeopteryx  is considered to be one of the most important ever discovered. Archaeopteryx is considered by many to be the link between dinosaurs and birds. It had teeth and claws, but it also had feathers and wings.
Protarchaeopteryx robusta - 135 MYA
   Protarchaeopteryx was a small, feathered, bird-like dinosaur that lived in China. This animal is considered to be more primitive than Archaeopteryx  However it was not an ancestor of the famous "first bird," as it lived ten million years later.

   

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 


 

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