Underfloor entrance & pollen loss

[Wingy]

Just transferred my bees from a 5 frame nuc (langstroth) into a brood box dummied to 7 frames. I've also put it on a home made floor with underfloor entrance using a design from this site.
Within an hour the bees were busy, no problem negotiating the new set up (except a few seem to fall out backwards, land on their back before righting themselves and flying off)
However I've now noticed lots of pollen in the sheltered part of the entrance just below where the bees climb up and just underneath the front that has fallen through the OMF.
Do others who use underfloor entrances notice this or have I done something wrong or just got clumsy bees?

 

[Swarm]

No pollen loss due to under hive entrance, why would there bee? The bees have essentially a full width entrance.

 

[Newbeeneil]

Same here... pollen loss never been a problem.

 

[jenkinsbrynmair]

Nope - never seen more than the odd spot of pollen lost with underfloor entrances, and I have quite a few.
They have been shovelling in the pollen the last few days and to be honest, I've hardly seen a speck spilt.

 

[Wingy]

Thanks for the replies, I'll monitor if for a few days and see how it goes. Gap is 9mm all the way across so didn't think there would be an issue. Loads coming in though. Nice to see some decent weather

 

[jenkinsbrynmair]

Like this you mean

 

[Wingy]

Like this you mean

Yes, that looks exactly like what I made. I'll try to get a picture of the pollen that's fallen off. It's along the back edge where the bees crawl up.

 

[Wingy]

https://beekeepingforum.co.uk/attachment.php?attachmentid=15388&stc=1&d=1523346750

Not the best picture but the pollen can be seen more to the right hand side at the back

 

[Poly Hive]

Is 9mm mouse proof?

8mm is for sure but 9?

PH

 

[jenkinsbrynmair]

never had a mouse issue with 9mm underfloor entrances and I have plenty - both mice and floors.