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Ornithology Exam 1 Quizzes 1 and 2

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Questions and Answers

Based on current fossil evidence, when did the first birds likely evolve?

Early Cretaceous period

Late Jurassic period (correct)

Early Jurassic period

Early Paleogene period

Which of the following traits below are derived traits characteristic of the therapods? (select all that apply)

Fully reversed Hallux and Antorbital fenestra

Pneumatized vertebra and air sacs and Furcula (correct)

Which of the traits below are derived traits of birds that are NOT shared with their closest relatives, the trodontids and dromaeosaurs? Select all that apply

Keeled Sternum and Carpometacarpus (correct)

Feathers and three digits on hands

Within the Aves, which major clade do the majority of extant bird species belong to?

Neoaves Signup and view all the answers

The chicken you ate last week belongs to which clades? (choose all that apply)

Bony fish (osteichthyes), Dinosauria, Archosauria Signup and view all the answers

What are the branching structures that come off the Rachis and make up the vane of a feather?

Barbs Signup and view all the answers

Match the feather with their description/function

Semiplume = Provide insulation and body contour Remiges = Flight feathers on wings Down = Entirely plumulaceous feathers that provide insulation No = No Signup and view all the answers

Match the feather with their description/function

Filoplume = Provide sensory feedback on the movement and position of vaned feathersfeathers Retrices = Flight feathers on the tail Bristle = Simple feathers that serve various functions related to protection and sense no = no Signup and view all the answers

The gaudy plumage displayed by some species of birds only during the breeding season is the...

Alternate plumage Signup and view all the answers

Blue feathers are a result of

Structural coloration Signup and view all the answers

Study Notes

Evolution of Birds

The first birds likely evolved based on current fossil evidence.

Characteristics of Therapods

Derived traits of therapods include:
- (select all that apply)

Unique Characteristics of Birds

Derived traits of birds that are NOT shared with their closest relatives, the trodontids and dromaeosaurs, include:
- (select all that apply)

Classification of Birds

The majority of extant bird species belong to the Aves clade.
The chicken belongs to the following clades:
- (choose all that apply)

Feathers

Barbs are the branching structures that come off the Rachis and make up the vane of a feather.
Match the feather with their description/function:
- (match the feathers with their descriptions/functions)

Bird Plumage

The gaudy plumage displayed by some species of birds only during the breeding season is the nuptial plumage.
Blue feathers are a result of structural coloration.