Varanus komodoensis nesting chamber?

I am investigating the ecological stoichiometry of Snowshoe Hares (L. americanus) and I need to estimate the age of wild-caught hares before chemical analyses. I am looking for a relatively simple, cost efficient method that uses a small sample of each hare to produce an age estimate.

My literature search yielded only two papers, one describing a method to count growth lines in mandibular bone cross sections of European hares (Iason, 1988), while the other provides a couple of allometric equations linking together hind foot length or body weight to age (Keith et al, 1968).

However, as both these sources are quite old, I was hoping someone could point me to more recently-developed techniques, or provide evidence of recent use/testing of the two methods mentioned above.

Thank you all in advance for your help!

I have been looking into tracking the movements of some grass snakes around the Cambridge area, could anyone suggest a non-invasive method for this that would also enable me to track them after having been through a body of water?

Do captive Correlophus ciliatus require UVB? And are they thought to be nocturnal or crepuscular?  

I am writing a paper on whether Crested geckos require UVB lighting as part of their husbandry, any help will be greatly appreciated. 

Thanks. 

How to euthanized small reptile using alcoholic solution? Some of the reference said that pentobarbital are good solution. However in field practice i have difficulties on availability and permission for this solution. Usually only alcoholic solution alvailable and i used injection method to brain. Is there any humane way euthanasia using alcoholic solution?

For example, small mammals can trigger a camera with an infrared sensor because these are warm blooded, but perhaps not so for a reptile that is cold blooded. Resolution could be a problem for small animals. Any good model for general purpose?

We are interested in analyzing the feces of desert locust adults that have fed on grass in the field. A cup of feces will allow us to analyze the feces in relation to locust behavior. We want to know the name of the grass the locusts had fed in the field to produce the feces.  

There is one supposed to be published in 2012, but it is now long overdue. The best alternatives that I have been able to find information on were published more than 50 years ago and simply are not available in the market.

I would like to make a morpho-metric analysis on Indian spiny tailed lizard without capturing and disturbing the animal in its habitat. It is very much necessary for me to find out the age structure of the population.