▁items ▁recorded ▁at ▁Lake ▁Cow al ▁include ▁fresh water ▁cr ust ace ans ▁such ▁as ▁the ▁common ▁y ab by ▁( Ch er ax ▁destruct or ), ▁sh rim p ▁of ▁the ▁genus ▁Mac ro bra ch ium ▁and ▁family ▁A ty idae , ▁insect s , ▁particularly ▁aqu atic ▁bugs ▁of ▁the ▁families ▁Not on ect idae ▁and ▁Cor ix idae , ▁fish ▁such ▁as ▁mos quit of ish ▁( G amb us ia ▁aff in is ) ▁and ▁gold fish ▁( Car ass ius ▁aur atus ), ▁and ▁occasionally ▁fresh water ▁sn ails ▁and ▁plant ▁material ▁such ▁as ▁medic ▁b urr ▁( M edic ago ▁polym or pha ). ▁ ▁Bre eding ▁When ▁they ▁are ▁bre eding , ▁long ▁white ▁pl umes ▁grow ▁from ▁the ▁back ▁of ▁their ▁heads ▁and ▁col oured ▁patch es ▁appear ▁on ▁the ▁face . ▁The ▁nest ▁is ▁an ▁open ▁platform ▁of ▁st icks ▁in ▁a ▁tree ▁in ▁which ▁the ▁female ▁l ays ▁two ▁or ▁three ▁eggs . ▁The ▁ch icks ▁h atch ▁after ▁ 2 1 ▁days . ▁The ▁birds ▁are ▁highly ▁sensitive ▁to ▁disturb ance ▁in ▁the ▁bre eding ▁season . ▁In ▁Australia , ▁whole ▁colon ies ▁have ▁been ▁known ▁to ▁desert ▁their ▁eggs ▁after ▁a ▁minor ▁ups et . ▁ ▁Gallery ▁ ▁References ▁ ▁Further ▁reading ▁ ▁External ▁links ▁▁ ▁Bird Life ▁Species ▁Fact sheet ▁ ▁royal ▁sp oon b ill ▁Category : B ird s ▁of ▁the ▁L esser ▁S unda ▁Islands ▁Category : B ird s ▁of ▁O ce ania ▁royal ▁sp