描述PloverCrocodileSymbiosis.jpg	English: A small bird such as a plover or sandpiper, representing the Trochilus described by Herodotus, eats leeches from the gaping open mouth of a Nile crocodile in an early example of Cleaning Symbiosis.
日期	1909年
來源	http://www.50birds.com/gendalligators2.htm, image taken from Popular Natural History, 1909
作者	Henry Scherren
授權許可 (重用此檔案)	PD-Old-100 and PD-1923; Scherren died in 1911 so copyright has expired.
其他版本	This file has an extracted image: PloverCrocodileSymbiosis (cropped).jpg.

A 'Trochilus' bird, perhaps a Sandpiper or Plover, Spur-winged Plover eats leeches from from the teeth of a Nile Crocodile, in a classic supposed example of cleaning symbiosis.

Egyptian Plover (Pluvianus aegyptius). Africa's Spur-winged Plover Vanellus spinosus is a lapwing and has black head with bold white triangle opening towards neck. P. aegypticus is a courser with a black head with two thin white stripes as here. The behaviour is apparently real, but not well documented. Dysmorodrepanis 21:35, 4 April 2008 (UTC)

Whatever the portrayed bird is meant to be, it is neither a Spur-winged plover (for instance black belly) nor an Egyptian plover (for instance black hindneck). The African bird it most resembles is the White-crowned/headed plover/lapwing (Vanellus albiceps). I guess the illustrator/author was not too familiar with African birds.

I wonder. The behaviour has been recorded among Sandpipers in Egypt, and the bird drawn is not unlike the Common Sandpiper (Actitis hypoleucos) (which overwinters in Egypt), so perhaps the artist used that as the model. Chiswick Chap (talk) 11:01, 17 February 2012 (UTC)

A footnote: there is little evidence for cleaning symbiosis between any bird and the Nile Crocodile, but what there is suggests that Herodotus and Scherren most likely heard about sandpipers; and Scherren clearly picked a sandpiper as his model for this illustration. Chiswick Chap (talk) 09:28, 4 November 2012 (UTC)

Illustration from Popular Natural History by Henry Scherren, published 1909. Image found at [:http://www.50birds.com/gendalligators2.htm].

	本作品在其來源國以及其他著作權期限是作者逝世後100年或以下的國家與地區屬於公有領域。 這個作品在美利堅合眾國屬於公有領域，因為它首次發布早於1930年1月1日，或於該日期之前在美國著作權局登記。
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