On long flights, I like to guess who is going home and who is traveling for play or work. This woman is definitely an Angelena. We are approaching our destination and fly over LA for half an hour before landing.

The politically ambitious and the beerily dissolute artisan of whom you read in the newspapers by no means constitute all the odder varieties of the species.

We find necessary and sufficient conditions for the family to be the family of multiweights of a positive-weighted graph with vertex set X.

The 'true' (Penelope) guans also occur at a range of altitudes but like most species of cracids, are mostly restricted to forest, both montane and lowland. Piping-guans (Pipile) are primarily lowland species, whereas numerous monospecific (single-species genus) taxa of guans (i.e. Aburria, Penelopina, Oreophasis) are restricted to montane environments.