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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
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 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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