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BIOL 1902 (382)
Lecture

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Department
Biology
Course
BIOL 1902
Professor
Michael Runtz
Semester
Fall

Description
 Tactile senses o Raccoons have touch-sensitive paws (tactile cells) o Can be around the mouth (otter)  whiskers = vibrissae o locate prey if hard to see (using hairs) o eastrngristle feathers (propuscular)  sandpipers (American Woodcock and Wilson’s Snipes) have pressure-sensitive cells o called HERBST CORPUSCLES in tip of bill  Woodpeckers have in tips of their tongues  HEAT PIT lies between the eyes and nostrils and can detect changes as small as 0.001 celcius (snakes)  Active searching  Goldenrod Crab Spider changes color to match flower its onh hunting  Spider webs are FLIGHT INTERCEPT traps  ORB WEAVERS spiders build spectacular webs  FUNNEL WEAVERS usually build webs on the ground  Sheet-web spider uses Knockdown strands (bottom has capture “sheet”)  Webs are best seen at dawn (because of dew) o Attracting moisture is called HYGROSCOPIC  Webs are HYGROSCOPIC o AgriopThought stabilimentum but doesn’t d
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