Killdeer (Charadrius vociferus) is another species that seems to be ubiquitous but of which I find incredibly hard to get good photographs. Due to the location, the ones I have photographs of would be the subspecies, Charadrius vociferus vociferus.
Killdeer, Hillsborough, North Carolina, USA, May 16, 2009
Killdeer, Santa Ana National Wildlife Refuge, Weslaco, Texas, USA, December 29, 2008