Graatsiline sinihaigur vee kohal kaarduva puutüve peal harjutusi tegemas.
Terasem vaataja juba mõttes küsib, et mis otsast see haigur sinine on?
Ega polegi, tegemist on noorlinnuga, kes kannab valget terve esimese
eluaasta. Kusjuures tegemist on selge kohastumisega, suled pole valged
teps mitte ilu pärast. Nimelt aktsepteerivad
Ameerika siidhaigrud
valget lindu paremini oma seltskonda, kui
siniseid vanalinde
ning siidhaigrutega koos kala püüdes, on noortel saagid suuremad. Lisaks
suurendab teiste valgete haigrutega segunemine ka kaitset erinevate
kiskjate vastu. Fotod tehtud Nicoya poolsaarel, Costa Ricas.
Graceful little blue heron exercising on an arched tree above the
water.
Observant viewer probably already thinks that on what end is this heron blue? Well, it is not as it is a juvenile and young Little Blue Herons gain a survival advantage by wearing white during their first year of life. Immature birds are likelier than their blue elders to be tolerated by Snowy Egrets—and in the egrets’ company, they catch more fish. Mingling in mixed-species flocks of white herons, immature Little Blue Herons probably also acquire extra protection against predators. The photos are taken in Nicoya peninsula, Costa Rica.
Observant viewer probably already thinks that on what end is this heron blue? Well, it is not as it is a juvenile and young Little Blue Herons gain a survival advantage by wearing white during their first year of life. Immature birds are likelier than their blue elders to be tolerated by Snowy Egrets—and in the egrets’ company, they catch more fish. Mingling in mixed-species flocks of white herons, immature Little Blue Herons probably also acquire extra protection against predators. The photos are taken in Nicoya peninsula, Costa Rica.
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