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The tree in which a female deposits the eggs is where the larvae will choose to feed. The most common host plants that caterpillars feed on are leaves from stonefruit trees. However, larvae will feed on many other types of tree foliage. Adult moths do not eat and live for 1–4 days. [7]
The Cape robin-chat (Dessonornis caffer) is a small passerine bird of the Old World flycatcher family Muscicapidae. It has a disjunct range from South Sudan to South Africa. [3] The locally familiar and confiding species [6] has colonized and benefited from a range of man-altered habitats, including city suburbs and farmstead woodlots. [7]
To concentrate the caterpillars, a strip of dark cloth about 12 inches wide – for example, burlap or old blue jeans, is tied around the tree at eye height. A string is tied around the cloth at its midpoint to create a fold of cloth around the tree. At mid-morning or later, the bands of cloth are checked for caterpillars, which are killed.
Cutworms are moth larvae that hide under litter or soil during the day, coming out in the dark to feed on plants. A larva typically attacks the first part of the plant it encounters, namely the stem, often of a seedling, and consequently cuts it down; hence the name cutworm. Cutworms are not worms, biologically speaking, but caterpillars.
Like all Australian robins, the eastern yellow robin tends to inhabit fairly dark, shaded locations, and is a perch and pounce hunter, typically from a tree trunk, wire, or low branch. Its diet includes a wide range of small creatures, mostly insects. Breeding takes place in the spring and, as with many Australian birds, is often communal.
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The caterpillars are herbivorous and gregarious in all their instars, and may be seen traveling in single-file processions over the food plant. [ 10 ] [ 19 ] [ 7 ] As the larvae develop, they will lose their orange color and will turn bright green and urticating , having many spines.
The host plant selection is vital because it provides the food source for the young caterpillars. Females are known to have multiple broods, [ 17 ] typically up to two to three. [ 8 ] The newly hatched caterpillars will group together until they shed their skin—termed an instar for each shedding.