Crawfish frogs feed opportunistically on insects and other small invertebrates that pass by their burrow.
As with most members of the genus, it feeds opportunistically on nuts, seeds, fungi, buds, stems, roots, foliage, and fruits.
Larvae appear to also opportunistically feed on small zooplankton while swimming.
It has recently been recognized that the whales are also feeding opportunistically along the Kimberley coast.
A few species may opportunistically feed on fruit and in one species, the Palm-nut Vulture, it forms the major part of the diet.
After emerging from the pupa the adult will feed opportunistically on nectar or other suitable food, such as carrion, while it matures.
Blue sharks rarely eat tuna, which have been observed taking advantage of the herding behavior to opportunistically feed on escaping prey.
There is a vast array of different insects that will feed opportunistically on pollen, as will various birds and other nectarivores.
It is mainly an ambush predator of fish but also feeds opportunistically on other animals that fall into the water such as terrestrial invertebrates.
As previously mentioned, they feed opportunistically and therefore will reside in whatever forest has the most food available.