What is Pelecaniformes?
{{no sources|date=July 2018}} {{Taxobox |name = Pelecaniformes |fossil_range=[[Late Cretaceous]]–Recent, {{fossilrange|65.5|0}} |image = Pelican 4995.jpg |image_width = 240px |image_caption = [[Brown Pelican]] (''Pelecanus occidentalis'') |regnum = [[Animal]]ia |phylum = [[Chordate|Chordata]] |classis = [[Bird|Aves]] |infraclassis = [[Neognathae]] |ordo = '''Pelecaniformes''' <small>(disputed)</small> |ordo_authority = [[Richard Bowdler Sharpe|Sharpe]], 1891 | range_map = | range_map_caption = |subdivision_ranks = [[Family (biology)|Families]] |subdivision = [[Anhingidae]]<br> [[Fregatidae]]<br> [[Pelecanidae]]<br> [[Phalacrocoracidae]]<br> [[Sulidae]] }} The '''Pelecaniformes''' is a [[Order (biology)|order]] of medium-sized and large [[waterfowl|waterbirds]]. They are found worldwide. As traditionally—but wrongly—defined, they include all [[bird]]s that have feet with four toes which are all webbed. Most have a bare throat patch ([[gular patch]]). Their [[nostril]]s have [[evolution|evolved]] into slits which do not work properly. This causes them to breathe through their mouths. They feed on [[fish]], [[squid]] or similar [[Marine biology|marine]] life. The young are [[altricial]]. They hatch from the [[Egg (biology)|egg]] helpless and naked in most cases. They lack a [[brood patch]]. {{biology-stub}} [[category:Pelecaniformes| ]]