Alphabet Aerobics

How did Greg spend his first day of unemployment? Look below and find out. Apparently now I know my ABC's, won't you read long with me?

Angry big cats dine entrails from gazelle herds; impalas jump knowing large meat-eaters nibble on peaceful quails, ripping sinew; tries unwavering vigilance with xenophobic yaks, zebras.

Zoologists: “Young xylem within vascular umbrella trees survives releasing quick photosynthetic operations. Nectar makes little kangaroos jump, inviting herbivore gluttony; frequent elevations demand constant botanical aliment."