Quite. I think you need just a rough guide: i.e. 'around 5 mms' rather than '4.96mms'. The main purpose, of course, of it is is to allow discrimination between species of (e.g.) 4-6 mms and 7-8mms.
Quote:
Originally Posted by Alan  Do we mean by sizes included with photos: The estimated size when we take a photo (for ID), or the size stated in a fieldguide (for info purposes)?
Either way the size can be variable depending on sex/cast or even feeding conditions (a bit like us!).. I admit, a rough size is better than nothing though.. Alan |