Mixed Swallowtail Caterpillars Papilio spp.

Asian Lime Swallowtail Butterfly caterpillar
Citrus Swallowtail Butterfly caterpillar
The caterpillar of many swallowtail butterflies has two distinct phases. The early instars are shiny brown and white to mimic bird droppings and the later instars are green to blend with leaves and look like small snakes, - both phases designed for protection from predators. Above is the first (bird poop) phase. Some also have spikes.
Swallowtail Butterfly caterpillar A white "V" shape in the centre is the Asian Lime/Citrus Swallowtail.
Swallowtail Butterfly caterpillar A Common or Scarlet Mormon caterpillar (above centre only) with netted white centre.
Swallowtail Butterfly caterpillar A flatter white bar in the centre; slight trident shape, also Asian Lime.
Swallowtail Butterfly caterpillar
Swallowtail Butterfly caterpillars
Lime Swallowtail Butterfly caterpillar
Many caterpillars of Mormon and Citrus Swallowtails look similar. Above left is the Asian Lime Swallowtail; above centre and right are the tiny earliest instars of the African Lime Swallowtail.
African Lime Swallowtail Butterfly caterpillar
African Lime Swallowtail Butterfly caterpillars
Lime Swallowtail Butterfly caterpillar
Larger African Lime/Citrus Swallowtail caterpillars.