REN R205 Lecture Notes - Lecture 2: Pine Grosbeak, Exit Pupil, Spotting Scope
6 Apr 2016
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Document Summary
Basic and alternate plumages of the adult bird ( non-breeding and breeding or fall and summer ) Feathers are made of keratin, they wear out. Female and male adult forms significantly different in appearance (ex, pine grosbeak) Females more colourful: lay eggs and leave with males to take care of (usually) Good for analysis, poor for recognition unless you have the recording. Bird syrinx an produce harmonies and multiple tones simultaneously. Exit pupil should be as large as your own pupil in dim light (4-5mm) Digiscoping : works with compact cameras/cells point counts: (typically 50m radius), 5-10 min duration. Piece of paper with circle mist net: mesh nylon net to catch small birds. If exit pupil is smaller thank your pupil, things will look dim. If exit pupil is larger than your pupil, it will not seem brighter. Other measurements taken on the bird relatively low return for the effort.
