Well, after the first one disappeared, two more spawned. I scooped them and dropped them back just to discover the species. They bred the trees really slowly, but no more butterflies showed up.
Nothing can be killing them, it's a closed space with no way out, except for a closed door, that I always close after leaving. The server just spent 14 hours running again and no new butterflies showed up. I've planted some flowers onto the ground (one from every type).
Also, I've never found a butterfly anywhere else in the server. No place else at all, and I've explored it A LOT.
That's very odd indeed. The Unleashed pack should be running almost the same version of Forestry as I do... the only difference between 18.104.22.168 and 22.214.171.124 is the support for 1.6.x, the revised bee system and occasional bugfixes regarding sided inventories, item stacking and the rendering of stairs in hand. Butterflies should behave exactly the same.
I don't know why you have this issue, especially since other players report that it's working fine for them, but as a stopgap fix you could look for the Forestry config file for butterflies and up the spawn limit a bit?
Also, maybe you could try Drkevlars method of using butterfly breeding to get the two you have to generate offspring.
I tried this same setup in the 1.6.4 server I play on. Started on an island and enclosed the entire thing in glass.
While the butterflies DO spawn, and they DO crossbreed trees - I dont think they breed trees any faster than bees. and based on observation between 1.5.2 and 1.6.4 - they are slower than a bunch of bees. I got tired of waiting and setup some bees.
Dont plant cactus, the butterflies will kill themselves on the cactus.
Keep your floor FLAT. they easily get stuck in 1x or 2x holes and trenches.
They seem to spend a lot of time trying to fly through my glass walls (rather than pollinating trees)
Start early. build a glass cage, put a forestry tree (or 2) in it and let them come while you work on other stuff.
It depends on the number of butterflies. One bee house is going to be faster than one or two butterflies. On the other hand, six bee houses didn't even begin to measure up to a swarm of 40+. It's really the numbers that make this work. And due to the changes in 1.6.4, only one fifth of your bees are fully capable to survive in apiaries, so if you want automation then the numbers advantage of butterflies is going to be even more noticable.
Of course, you can do bees while you wait for the butterfly numbers to build up
I've found that, after you've built the enclosure, the time it takes to get a lot of butterflies is faster than the time it takes to crossbreed one tree with bees. And the time it takes to crossbreed with butterflies is around an hour.
It takes 1/2 to 2/3 of a day to get enough butterflies. And it takes about a day to crossbreed with bees. Though with the randomness involved it varies.
I have started breeding them in the Escritoire, but I can't get new species, I always get the same species again. I have now 10 butterflies, but no other butterfly spawned on itself.
Also, I didn't change awnything in the config from default FTB Unleashed configs:
# 126.96.36.199 (611)
# Config files:
# base.conf - Contains Forge configuration for block and item ids
# common.conf - Contains all options common to Forestry
# apiculture.conf - Contains all options for bee breeding
# backpacks.conf - Contains custom configurations for backpacks
# pipes.conf - Configures item id for the apiarist's pipe
# gamemodes/ - Configures available gamemodes
# determines the global butterfly entity count above which natural spawning of butterflies ceases.
# determines the global butterfly entity count above which butterflies will stay in item form and will not take flight anymore.
The area is correctly chunkloaded, with the CL radius ending beyond the glass walls.
Hrm. So, I'm going to summarize some things I've read through the thread. I have not done any testing of this, personally. This is just a summary of the responses in the thread.
Faster in the long term.
Does not require sunlight.
Slow to start
Can be a bit buggy, it seems (no pun intended)
Requires a specialized, closed-in building.
Does not work with Vanilla Trees (they need a genome)
There can be some unwanted leftover pollen when you switch to get some different tree types.
Works with vanilla trees (though slower than with genome'd trees)
Does not require a closed-off space.
Gives resources other than trees in the process.
Bees are annoying.
Butterflies will be faster in the long term
Bees are annoying
Requires sunlight (not counting Binnie's, for now)
Bees are annoying.
Butterflies will take a long time to start up, but eventually, they'll grow to be faster than bees, without your intervention at all, beyond harvesting the saplings. Bees don't really change hteir speed at all, but they'll be faster to start with. If you need some new trees RIGHT NOW, bees are probably your best bet. If you can be patient waiting for it, then go for butterflies. Also, if you just don't have access to bees, butterflies will work. Also if you HATE bees, butterflies will work. Of course, if you like bees, there's no reason not to do both.
Just always keep in mind that on a populated server, there might already be a lot of butterflies out and about in the world. By default, Forestry spawns only up to 100 butterflies in the entire world; all additional butterflies have to be created by the player (see: post #25).