It's From Siberia

Ever wonder what the black bird with the red beak is? Moorhens are medium-sized water birds which are members of the rail family Rallidae. They constitute the genus Gallinula. I think they are nesting in the spatterdock. They are fun to watch as they drag sticks and twigs, etc. back into the weeds. If I am right, there are a lot of nests out there right now. The Common Moorhen feeds in reeds and along the edges of marshes. It pecks like a chicken or swims and dives like a duck in search of food. Often, it is seen walking on top of marsh plants searching for seeds, grasses, small snails, and insects. It is often heard making loud chicken-like sounds while feeding. These rails are all brown and black with some white markings in plumage, and, unlike many of the rails, they are usually easy to see, feeding in open water margins rather than skulking in reedbeds. They tend to have short, rounded wings and be weak fliers, although nevertheless capable of covering long distances; the Common Moorhen in particular migrates up to 2,000 km from some of its breeding areas in the colder parts of Siberia. Those that migrate do so at night. Moorhens can walk very well on strong legs, and have long toes that are well adapted to soft, uneven surfaces. These birds are omnivorous, taking plant material, small animals and eggs.

They are aggressively territorial during the breeding season, but are otherwise often found in sizeable flocks on the shallow vegetated lakes they prefer. Typically a medium-sized, ground-dwelling bird found near water. From a distance it looks black with a ragged white line along its body. Up close it is olive-brown on the back and the head and underneath are blue-grey. It has a red bill with a yellow tip. It breeds in the UK in lowland areas, especially in central and eastern England. It is scarce in northern Scotland and the uplands of Wales and northern England. UK breeding birds are residents and seldom travel far. It also breeds in Hampton Terrace!

They are pretty fun to watch and hear squabbling in the lake. Guess they all have to fight over the one perfect cow lily which produces the perfect nest.