Dear W: Here is URL to a lot of bird pictures. http://www.mbr-pwrc.usgs.gov/id/pictlist.html

I think the "fissirostral" adjective means the part of the beak that joins the skull is forked,
that is skull is pointed anteriorly, and beak has notch at base that fits over this.

It's been years since I saw a nighthawk. They were numerous on Boston streets kn late
evening. Site I visted says they like to nest on flat roofs, and eat insects at night,
including mosquitoes. Anything that easts mosquitoes gets my vote.