[16]

Dec 17' 71. Storks clatter the

their beaks when excited, with

[Variation 1: 94: "Storks, when excited, make a loud clattering noise with their beaks. Some snakes produce a grating or rattling noise."]

Porcupines rattle their odour quills on their body when

it is not commonly known, as in

to me, that they bear on these

peculiar kind of short quills, (supp

very foot-stalk,) thin & open like a goose quill with end

this is supported on a thin elastic

When angry they vibrate their

, as I saw, & they their short hollow

strike against each other & make

surprising noise different from the rattle

these ordinary quills — It is scarcely p

doubt that the quills have been spe

as a sound-producing organ, & that they

their tails in order to produce this

as strictly as do rattle-snake.—

when an

[Variation 1: 93-4: "Porcupines rattle their quills and vibrate their tails when angered; and one behaved in this manner when a live snake was placed in its compartment. The quills on the tail are very different from those on the body: they are short, hollow, thin like a goose-quill, with their ends transversely truncated, so that they are open; they are supported on long, thin, elastic foot-stalks."]