a South American hawk (Herpetotheres cachinnans); — so called from its notes, which resemble a shrill laugh.
hyponitrous oxide, or protoxide of nitrogen; — so called from the exhilaration and laughing which it sometimes produces when inhaled. It is much used as an anæsthetic agent.
the European white-fronted goose.
An American gull (Larus atricilla). In summer the head is nearly black, the back slate color, and the five outer primaries black.
the spotted hyena. See Hyena.
the great brown kingfisher (Dacelo gigas), of Australia; — called also giant kingfisher, and gogobera.
a peculiar owl (Sceloglaux albifacies) of New Zealand, said to be on the verge of extinction. The name alludes to its notes.
