Black Rosy Finch

The Black Rosy Finch builds a cup nest in a cavity on a cliff. Most birds migrate short distances to lower elevations and further south and return to the alpine areas in April. These birds forage on the ground, may fly to catch insects in flight. They mainly eat seeds from weeds and grasses and insects, often in areas where snow is melting, uncovering food items and new plant shoots are growing. They often feed in small flocks, sometimes mixing with Gray-crowned Rosy Finches. A male will defend its female's territory during breeding season, not just the nest but where ever she goes. This behavior is common with the rosy finches. When breeding both males and females develop throat pouches, known as gular pouches or gular skin, to carry food to their chicks, a trait seen in only one other North American genus, Pinicola. Due to their inaccessibility, actual Black Rosy Finch nests had been reached by only three researchers as of 2002. The nests are made of grass and stems and lined with fine grass, hair, and feathers. They are known to use protected areas such as openings in cliffs, mine shafts, caves, and rafters. They eat seeds and insects, usually foraged from the ground, including snowfields. Their call is a buzz-sounding "chew".

Little Blue Heron

The Little Blue Heron, Egretta caerulea, is a small heron. It breeds from the Gulf states of the USA through Central America and the Caribbean south to Peru and Uruguay. It is a resident breeder in most of its range, but some northern breeders migrate to the southeastern USA or beyond in winter. There is post-breeding dispersal to well north of the nesting range, as far as the border between the US and Canada.
The Little Blue Heron's breeding habitat is sub-tropical swamps. It nests in colonies, often with other herons, usually on platforms of sticks in trees or shrubs. 3-7 light blue eggs are laid.

This species is about 60 cm (24 in.) long, with a 102 cm (40 in.) wingspan, and weighs 325 g (11.5 oz/0.72 lbs). It is a medium-large, long-legged, heron with a long pointed blue or greyish bill with a black tip.
Breeding adult birds have blue-grey plumage except for the head and neck, which are purplish and have long blue filamentous plumes. The legs and feet are dark blue. Sexes are similar back.

Non-breeding adults have dark blue head and neck plumage and paler legs. Young birds are all white except for dark wing tips and have yellowish legs. They gradually acquire blue plumage as they mature.

White Little Blue Herons often mingle with Snowy Egrets. The Snowy Egret tolerates their presence more than Little Blue Herons in adult plumage. These young birds actually catch more fish when in the presence of the Snowy Egret and also gain a measure of protection from predators when they mix into flocks of white herons. It is plausible that this is because of these advantages, they remain white for their first year.
The Little Blue Heron stalks its prey methodically in shallow water, often running as it does so. It eats fish, frogs, crustaceans, small rodents and insects.