This is a list of a bunch of essential tools you may need while out in the field.  I do not condone collecting animals, and while some of these items would make collecting easier, I primarily use them  to briefly take pictures of the animals.  It is important to note that some of these items may be illegal to use or posess in certain areas. Primarily, anything that looks like collecting equipment will be treated as such if you are in an area where collecting is not allowed. Always be sure to be familiar with your local regulations and err on the side of caution if you are not sure. This is not a complete list but gives a pretty good idea of what may be in my backpack or car.

Hook

Tongs

Potato Rake

Camera w/ extra batteries and memory

Tripod

GPS with compass and altimeter

Plastic bins/bags for amphibians

Snake bags

Field Guide

Dip Net

Flash light

Delorme Gazeteer and topomaps

Field notebook

Cell phone

Water

Toilet paper

Permits when applicable