Henrik Gronvald (Grønvold) (1858 – 23 March 1940) was a Danish naturalist and artist, known for his illustrations of birds. Grønvold was among the last natural history illustrators to publish lithographs. Henrik Grønvold was born in Præstø, Denmark. He was the son of Hans Peter Levin Grønvold (1822–84) and Wilhelmine Marie Cathrine Lassen (1821–65). He had an early interest in natural history, and an early aptitude for natural history art. In 1880, he went to Copenhagen to learn machine drawing at the Copenhagen Technical College. After graduation, he worked first as a draughtsman of the Royal Danish Army‘s artillery and an illustrator at the Biological Research Station of Copenhagen.
In 1892, Grønvold left Denmark intending to emigrate to the United States. While stopping in London en route, he was employed at the Natural History Museum preparing anatomical specimens. His Swedish-born wife, Josefina Wilhelmina Hillstrøm (1869-1935), joined him a year later. Henrik Grønvold became a skilled taxidermist, and established a reputation as an artist. He was employed at the Museum until 1895, when he accompanied William Ogilvie-Grant on an expedition to the Salvage Islands. After this expedition, Grønvold worked at the Museum in an unofficial capacity as an artist for decades, and only left London to attend an ornithological congress in Berlin.
His illustrations largely appeared in scientific periodicals such as the Proceedings and Transactions of the Zoological Society, The Ibis and the Avicultural Magazine. In these publications, he drew plates for William Ogilvie-Grant, George Albert Boulenger, and Michael Rogers Oldfield Thomas, among others. Grønvold also completed numerous plates for Walter Rothschild, many of which appeared in Rothschild’s journal Novitates Zoologicae. Grønvold mostly illustrated birds and eggs, rare and newly discovered species from many parts of the world, and mostly worked in lithographs. His egg plates include some of great auk eggs made for Alfred Newton. He made some depictions of mammals as well, and the Natural History Museum collection has oil paintings of apes he made for Rothschild.