Lemon

The lemon is a small evergreen tree native to Asia, and the tree's ellipsoidal yellow fruit. The fruit is used for culinary and non-culinary purposes throughout the world, primarily for its juice, though the pulp and rind are also used in cooking and baking. The juice of the lemon is about 5% to 6% citric acid, which gives lemons a sour taste. The distinctive sour taste of lemon juice makes it a key ingredient in drinks and foods such as lemonade.

Crunchiness

Crunchiness is the gustatory sensation of muffled grinding of a foodstuff. Crunchiness differs from crispness in that a crisp item is quickly atomized, while a crunchy one offers sustained, granular resistance to jaw action. While crispness is difficult to maintain, crunchiness is difficult to overcome.

Vickers (1981) and Christensen and Vickers (1981) aver that crispness and crunchiness can each be "assessed on the basis of sound alone, on the basis of oral-tactile clues alone, or on the basis of a combination of auditory and oral-tactile information." They also note that an acoustic frequency of 1.9 kHz seems to mark the threshold between the two sensations, with crunchiness at frequencies below, and crispness at frequencies above.

Crunchy foods include:
Carrots
Crunch bar
Mints
Peanuts

Buff-necked Ibis

The Buff-necked Ibis (Theristicus caudatus), also known as the White-throated Ibis, is a fairly large ibis found widely in open habitats of eastern and northern South America. It formerly included the similar Black-faced Ibis as a subspecies, but that species is almost entirely restricted to colder parts of South America, has a buff (not dark grey) lower chest, and lacks the contrasting large white wing-patches.