I'm rubbish at finding birds' nests, and rubbish at identifying their eggs, and so I have a small sneaking admiration for the skill of egg collectors but that is where it ends.
Talking to RSPB Investifations staff, they are more hard-nosed on the subject. Here is a selection of things they said: 'look like petty criminals and are', 'more obsessive than birders', 'often spotted by birdwatchers just because they look shifty' and so on.
Egg collectors are always male - there was an unverified rumour of a female egg-collector but it was probably just 'wishful' thinking. And they are competitive - they want to get to that egg first. A typical egg collector, if there is such a thing, will have amassed a collection of between 1000 and 2000 eggs, with many Schedule 1 species represented in it.
But they are a dying breed. That might partly be because far too many of us are losing touch with nature but it is more likely to be better police action co-ordinated through Operation Easter and the introduction of custodial sentences for the crime. In the past the same people would keep re-appearing in front of magistrates, collect a fine and go back to their pillaging.
There have been 11 individual egg collectors given custodial sentences (one has had two and another three), with the longest being 5 months. The big stick approach seems to be working as the incidence of egg-collecting is falling.
But birds of conservation concern are still targetted. Last year the pair of red-backed shrikes nesting in the UK needed intensive guarding and surveillance as it was visited by known egg collectors, and this is a species whose demise in England was probably sealed by egg collectors (although the overall decline was more to do with the loss of large insects from farmland, we believe). Very rare species (once even rarer) such as white-tailed eagle and bittern have been targetted by egg collectors.
And you can't show off your collection of dead young birds (that's what eggs are) very easily so they are hidden away in secret rooms (by the rich) or in a specially-adapted caravan or under the floorboards if you are of more modest means. The police, when searching for egg collections, look in all the places where they would look for drugs if on a drugs raid.
Although a dying breed, the activities of egg-collectors still can have harmful impacts and the RSPB spends thousands of pounds a year guarding nests and investigating crimes and suspected crimes. Nobody else will do it if we don't.
A love of the natural world demonstrates that a person is a cultured inhabitant of planet Earth.
Red backed Shrikes declined due to the use of Ivemec in stock killing all beetles and insects that feed on their dung. This chemical is still found on RSPB reserves even though in some cases the grass letting is for stock without this chemical use on the reserve itself. I used bag cow dung for the green house and the bag used to be full of beetle lava. Not any more.