Eggs of Red-necked Nightjar
Seebohm
1896
Henry Seebohm <i><a rel="nofollow" class="external text" href="https://archive.org/details/colouredfigureso00seeb">Illustration from Eggs of British Birds</a></i>  1896 <a rel="nofollow" class="external autonumber" href="https://archive.org/stream/colouredfigureso00seeb#page/n313/mode/2up">[1]</a>