Forest Unseen Pt 2 Flashcards
advertising” of toxicity with color — eg dart frogs. Colors, sounds, odors, spines, aggression.
Aposematism
The sap of the giant hogweed (or wild parsnip) causes
phytophotodermatitis
The ——— make skin unable to protect itself from sunlight, leading to blisters that can be terrible—but only if exposed to UV/sunlight.
furanocoumarins
How long does it take for giant hogweed poison to start to have its effect?
30 min
Giant hogweed compounds are used to treat ———— (with the attendant risks).
Vitiligo
(a chronic autoimmune disorder that causes patches of skin to lose pigment or color.)
Tetrachromat birds (like chickadees) can also see
UV
Two interesting facts about chickadee vision:
1) Cones 2x more dense
2) tetrachromat
Tetrachromatic vision might help spot these UV reflectors:
1) wild grapes
2) wings of some beetles
3) some caterpillars
What do Black vultures do to cool themselves when it’s very hot?
‘pee’ on their unfeathered legs
Down holds heat —— better than an equal thickness of styrofoam
10x
What can some birds such as hummingbirds and swifts so to survive cold weather?
Lower body temp by as much as 50 F.
Horsehair worms that parasitize crickets and grasshoppers make it do what?
Go to water (by moving heedlessly) where the adult worm bores out
What do horsehair worm larvae do in water?
get eaten by the larvae of mayflies, midges, and mosquitoes, whose adult forms then get eaten (upon death) by crickets.
Where are horsehair worms found?
Dry places in New Mexico (one example)
When/where did the Doctrine of Signatures originate?
Galen, 200AD
