They should already be arriving!
Of course, if they've never nested there before it may take awhile before they find them

PAT,

Anytine now but April most likely if you have never had martins before. Have you?? I highly encourage you to use Starling Resistent entrances on your gourds if you don't have them. My clinger entrance works so sweet to keep out starlings and if you truly want a martin colony you must not allow starlings to be around occupying the gourds in any form. If you don't have the SREH then you need to shoot the,trap them..whatever. They simply cannot be tolerated and here is why.

If you have neevr had nesting martins before the ones that may visit will hardly give your gourds a chance if right away upon arrival that have to fight for a gourd with a bunch of starlings. They will simply move on. Now at an established martin colony they will fight for their rights more but in the end it is their doom. The starlings are more aggressive,they have legs like a fighting chicken,and a dagger beak that they kill martins will easily. Martins can outfly them easy but if a starling traps a martin inside a acavity and the martin fights back it is over for the martin every time. For these reasons starlings must not be allowed to be in your gourds and that is why you need to have the starling resistent entrance holes on them.

I wish you the best of luck. Martins are wonderful birds and once you are hooked by their magic you will undertsand if you have never had them in your backyard before. They are simply forever summertime smile..Mike

Pat,
You might like to try looking at the PMCA's arrival page. You can look up when the ASY and SY are arriving in your area. PMCA's scout arrival page