I haven't seen any curlews yet this year, Nor any kildeer, Kildeer are usually here long before this time.
The last couple of days I have been hearing the call of a bird that I don't think I recognize. It is sort of course and guttural, a Kuuk roo kuk kuuk roo kuk kuuk roo kuk. I haven't had a close look at the bird, it's about the size of a morning dove.
might be one of the cuckoos, but they usually don't come until mid June, or at least the one's I recognize don't.